- Random - Mailing list — Dipartimento di Matematica, UniPI

FW: Postdoc position at HU Berlin
by Tiziano De Angelis 12 May '21

12 May '21

Dear All, I am forwarding the email below concerning a 3-year postdoc opportunity at HU Berlin in the area of stochastic control, understood in a broad sense. Interested candidates should get in touch with Prof. Ulrich Horst ( horst(a)math.hu-berlin.de) The deadline for applications is 8 June. Best wishes Tiziano *From:* Ulrich Horst <horst(a)math.hu-berlin.de> *Sent:* 07 May 2021 16:11 *To:* Tiziano De Angelis <T.DeAngelis(a)leeds.ac.uk> *Subject:* Postdoc position at HU Berlin Dear Tiziano. I am currently looking for a new postdoctoral student with a research interest in stochastic control, game theory, BSDEs ... The appointment would be for three years. I would be most grateful, if you could forward this mail to interested students. Interested students can contact me at any time for more information. Applications can be sent to me by mail. Here is the link to the official job ad (unfortunately in German). The reference number is AN/109/21 https://www.personalabteilung.hu-berlin.de/de/stellenausschreibungen/wissen… The deadline for applications is June 8th. Many thanks for your help and best wishes, Ulrich

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LTI@Unito webinar: Maria Flora (CREST, ENSAE) “The liquidity uncertainty premium puzzle” | May 17, 2021 @12:45
by Luca Regis 12 May '21

12 May '21

Dear Colleagues, I am happy to share with you the following invitation to the Quantative Finance webinar organized by LTI@UniTO and Collegio Carlo Alberto, “The liquidity uncertainty premium puzzle” by Maria Flora (CREST, ENSAE, Institut Polytechnique de Paris), which will take place on Zoom on May 17, at 12.45. Below you find the Zoom link and an abstract of the presentation. Best regards, Luca Regis <#> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/8Hh8hw5fQzN4jQSpBpJlwM967VPpREqhwi…> <#> LTI@Unito and Fondazione Collegio Carlo Alberto are pleased to invite you to the following workshop <#> *May 17, 2021 | 12:45 - 13:45* *“The liquidity uncertainty premium puzzle”* *Maria Flora (CREST, ENSAE, Institut Polytechnique de Paris)* <#> *Abstract*: We address a classical puzzle in financial economics: the counter-intuitive negative relation between volatility of volume and asset returns originally put forward by Chordia, Subrahmanyam, and Anshuman (2001) and confirmed by the subsequent empirical literature. We show that the alleged negative relation is not robust to the aggregation window, nor to the way the volatility of volume is measured. In particular, when we employ high-frequency one-minute volume data, the relation is positive and robust, restoring economic intuition which commends investors’ aversion to liquidity uncertainty. *Zoom link*: https://us02web.zoom.us/j/81109847151?pwd=TEl0L1lNVEtUbjh5RVJvM3pRUG40UT09 <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/hB0bS22L3Y_ENjUYgp7T2q29i3-4-1d8K-…> Meeting ID: 811 0984 7151 Passcode: 268588 <#> <#> <#> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/UOaR7QZZ72ijC7nTqdjimVg5pfXen_62Nr…> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/xNe5dk_6XysCdtcFZgp9tEdEOiDcNPaSPo…> <#> FONDAZIONE COLLEGIO CARLO ALBERTO Piazza Arbarello 8 - 10122 Torino, Italy phone: +390116705000 segreteria(a)carloalberto.org - www.carloalberto.org Facebook <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/aYJaD7KHzPThdS0ChTziuoKxUUel5iGJkU…> Twitter <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/vhWcXWrVH_v7eAq6F84bbGMelwvSuUQT3Q…> LinkedIn <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/dfKa9OGMdhR4lMt-qQMtDhs0uMVON6_UUF…> Instagram <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/FZi5lYdgx-IrtBPfZ_N1VOEbhUdSAHDONW…> Youtube <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/LsxVbQ7peor6-eKyVmNsaiIImZcs_kIZ2U…> <#> *INFORMATION UNDER THE NEW GENERAL DATA PROTECTION REGULATION (GDPR)* Your personal information has been gathered for the exclusive purpose of informing you about the Collegio's initiatives, considering our and your legitimate interest or your consent. If you wish to have your personal data modified please contact Fondazione Collegio Carlo Alberto, piazza Arbarello 8, 1022 Torino, Italy - phone: +390116705000 - privacy(a)carloalberto.org *Unsubscribe* <https://4z5y5.r.a.d.sendibm1.com/mk/un/4yxQgjiLOUKfT5Le7ZNWi9naP-lw6lYItnef…> <#> © 2021 Fondazione Collegio Carlo Alberto

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virtual seminar in Insubria & Bicocca
by Emanuela Rosazza Gianin 12 May '21

12 May '21

Dear all, On *May 20 at 17:00, Cosimo-Andrea Munari* (University of Zurich) will give a virtual seminar “in Insubria & Bicocca”, to which you are all invited. You can find the title and abstract below. Title: Capital requirements and claims recovery: A new perspective on solvency regulation Abstract: Protection of creditors is a key objective of financial regulation. Where the protection needs are high, i.e., in banking and insurance, regulatory solvency requirements help prevent creditors from incurring losses on their claims. The current regulatory requirements based on Value at Risk and Expected Shortfall limit the probability of default of financial institutions, but fail to control the size of recovery on creditors' claims in the case of default. We resolve this failure by developing a novel risk measure, Recovery Value at Risk. Our conceptual approach is flexible and allows the construction of general recovery risk measures. By design, these risk measures control recovery on creditors' claims and integrate the protection needs of creditors into the incentive structure of the management. The seminar will be on *Zoom*. You can find the information to join below. Speaker: Cosimo-Andrea Munari (Univ. Zurich) Topic: Capital requirements and claims recovery: A new perspective on solvency regulation Time: May 20, 2021 05:00 PM Rome Where: Zoom Link: https://us02web.zoom.us/j/82132902292?pwd=UlJXcE5mT1dmSmhtKzNkS1pXTlRhUT09 ID riunione: 821 3290 2292 Passcode: 912323 After the talk, you are all invited to remain in the meeting for an informal aperitif and chat. Please forward to anyone interested. Kind regards, Elisa Mastrogiacomo and Emanuela Rosazza Gianin ****************************************** Emanuela Rosazza Gianin Dipartimento di Statistica e Metodi Quantitativi Università di Milano-Bicocca Edificio U7 – 4° Piano Via Bicocca degli Arcimboldi, 8 20126 Milano Tel. 02 64483208 e-mail: emanuela.rosazza1(a)unimib.it ******************************************

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Online Seminar @SNS, Julien Guyon (Bloomberg L.P.), May 18 2021 at 4 PM (CEST)
by Giulia Livieri 12 May '21

12 May '21

Dear all, Tuesday, May 18 at 4 PM (CEST) there will be the following online seminar. Speaker: Julien Guyon (Bloomberg L.P.); below the short bio. Title: Dispersion-Constrained Martingale Schrodinger Problems and the Joint S&P 500/VIX Smile Calibration Puzzle Abstract: The very high liquidity of S&P 500 (SPX) and VIX derivatives requires that financial institutions price, hedge, and risk-manage their SPX and VIX options portfolios using models that perfectly fit market prices of both SPX and VIX futures and options, jointly. This is known to be a very difficult problem. Since VIX options started trading in 2006, many practitioners and researchers have tried to build such a model. So far the best attempts, which used parametric continuous-time jump-diffusion models on the SPX, could only produce approximate fits. In this talk we solve this long standing puzzle for the first time using a completely different approach: a nonparametric discrete-time model. Given a VIX future maturity T1, we build a joint probability measure on the SPX at T1, the VIX at T1, and the SPX at T2 = T1 + 30 days which is perfectly calibrated to the SPX smiles at T1 and T2, and the VIX future and VIX smile at T1. Our model satisfies the martingality constraint on the SPX as well as the requirement that the VIX at T1 is the implied volatility of the 30-day log-contract on the SPX. The model is cast as the unique solution of what we call a Dispersion-Constrained Martingale Schrodinger Problem which is solved by duality using an extension of the Sinkhorn algorithm, in the spirit of (De March and Henry-Labordere, Building arbitrage-free implied volatility: Sinkhorn's algorithm and variants, 2019). We prove that the existence of such a model means that the SPX and VIX markets are jointly arbitrage-free. The algorithm identifies joint SPX/VIX arbitrages should they arise. Our numerical experiments show that the algorithm performs very well in both low and high volatility environments. Finally, we discuss how our technique extends to continuous-time stochastic volatility models, via what we dub VIX-Constrained Martingale Schrodinger Bridges, inspired by the classical Schrodinger bridge of statistical mechanics. The resulting stochastic volatility model is numerically implemented and is shown to achieve joint calibration with very high accuracy. Time permitting, we will also briefly discuss a few related topics: (i) a remarkable feature of the SPX and VIX markets: the inversion of convex ordering, and how classical stochastic volatility models can reproduce it; (ii) why, due to this inversion of convex ordering, and contrary to what has often been stated, among the continuous stochastic volatility models calibrated to the market smile, the local volatility model does not maximize the price of VIX futures. Short bio: Julien Guyon is a senior quantitative analyst in the Quantitative Research group at Bloomberg L.P., New York. He is also an adjunct professor in the Department of Mathematics at Columbia University and at the Courant Institute of Mathematical Sciences, NYU, and a Louis Bachelier Fellow. Julien serves as an Associate Editor of SIAM Journal on Financial Mathematics, Finance & Stochastics, and Journal of Dynamics and Games, and as a Managing Editor of Quantitative Finance. Before joining Bloomberg, Julien worked in the Global Markets Quantitative Research team at Societe Generale in Paris for six years, and was an adjunct professor at Universite Paris Diderot and Ecole des Ponts ParisTech. Julien co-authored the book Nonlinear Option Pricing (Chapman & Hall, 2014) with Pierre Henry-Labordere. He has published more than 20 articles in peer-reviewed journals (including Finance & Stochastics, SIAM Journal on Financial Mathematics, Quantitative Finance, Risk, Journal of Computational Finance, Annals of Applied Probability, Stochastic Processes and their Applications) and is a regular speaker at international conferences, both academic and professional. His main research interests include nonlinear option pricing, volatility and correlation modeling, (nonlinear) optimal transport, and numerical probabilistic methods. A big soccer fan, Julien has also developed a strong interest in sports analytics, and has published several articles on the FIFA World Cup, the UEFA Champions League, and the UEFA Euro both in academic journals and in top-tier newspapers such as The New York Times, The Times, Le Monde, and El Pais, including a new, fairer draw method for the FIFA World Cup. Some of his suggestions for draws and competition formats have already been adopted by FIFA and UEFA. His paper "Risk of collusion: Will groups of 3 ruin the FIFA World Cup?" won the 2nd prize at the 2021 MIT Sloan Sports Analytics Conference, the biggest sports analytics event in the world. The link for joining the meeting is: https://teams.microsoft.com/l/meetup-join/19%3ameeting_MzdlZDljNmMtZDU3Zi00…

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Fwd: "Random excursions with Jean Bertoin", second announcement - please register before May 15th
by Faggionato, Alessandra 10 May '21

10 May '21

Buongiorno ricevo ed inoltro l'annuncio per il workshop ``Random excursions with Jean Bertoin". Attenzione alla scadenza imminente per la registrazione. Saluti Alessandra ---------- Forwarded message --------- Da: Grégory Miermont <gregory.miermont(a)ens-lyon.fr> Date: sab 8 mag 2021 alle ore 00:20 Subject: "Random excursions with Jean Bertoin", second announcement - please register before May 15th [Apologies for multiple postings] Dear friends, dear colleagues, This is the second announcement for the conference "Random excursions with Jean Bertoin" in honour of his 60th birthday, to be held in Paris, Sorbonne Université, July 5 to 9, 2021. All relevant information will be available on the conference website at the address http://jb60.math.cnrs.fr which will be regularly updated. Registration, via this webpage, is free but mandatory. *Please note that registration will be closed on May 15th. * Given the current pandemic situation, part of the public and of the speakers will have to attend the conference online. As you register, please indicate whether you would agree to participate from home if needed. We will soon contact all registered participants with information about attending the conference in person or remotely. If you have any questions you can contact Franziska Robmann at franziska.robmann(a)math.uzh.ch Please feel free to forward this message to anyone you think might be interested. We hope to see you all in July! Best wishes, Grégory Miermont, for the organizers. -- ************************************************* Prof. Alessandra Faggionato http://www1.mat.uniroma1.it/~faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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ISBA@CIRM (France)
by Julyan Arbel 10 May '21

10 May '21

Dear all, There will be a mirror workshop for ISBA world meeting, 28 June – 2 July, at CIRM in Marseille calanques (France). It is now possible to register to CIRM: https://conferences.cirm-math.fr/2701.html There is no registration fee, the only cost being the full-board on-site accommodation at CIRM to be paid upon arrival. More details: https://xianblog.wordpress.com/2021/05/10/isbcirm-through-the-looking-glass/ Best, Julyan Arbel Inria Grenoble Rhône-Alpes http://www.julyanarbel.com/ @JulyanArbel

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Internships in supervised machine learning at the Basque Center for Applied Mathematics, Bilbao, Spain
by Gianni Pagnini 10 May '21

10 May '21

Cari colleghi, Vorrei diffondere attraverso questa mailing-list l’avviso di due possibilità di internship della durata di 3 mesi presso il BCAM di Bilbao su temi legati al machine learning. La scadenza per inviare le domande è il 1 Luglio. I link per accedere alla descrizione delle proposte sono i seguenti http://www.bcamath.org/documentos_public/archivos/internships/BCAM_Internsh… <http://www.bcamath.org/documentos_public/archivos/internships/BCAM_Internsh…> http://www.bcamath.org/documentos_public/archivos/internships/BCAM_Internsh… <http://www.bcamath.org/documentos_public/archivos/internships/BCAM_Internsh…> mentre l’invio delle domande deve avvenire attraverso questo http://www.bcamath.org/en/research/internships <http://www.bcamath.org/en/research/internships> Grazie. Saluti, Gianni — Gianni Pagnini Ikerbasque Research Associate BCAM - Basque Center for Applied Mathematics Alameda de Mazarredo, 14 E-48009 Bilbao, Basque Country - Spain Tel. +34 946 567 842 gpagnini(a)bcamath.org | www.bcamath.org/gpagnini ( matematika mugaz bestalde )

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Two postdoc positions at Lille (France)
by Giovanni Conforti 10 May '21

10 May '21

Ricevo e inoltro %%%%%%%%%%%%%%%%%%%%%%%% Dear colleagues, Two 1-year postdoc positions are available at Institut Mines Télécom (IMT) Lille Douai, France, from September 2021: * with Benoît Henry and David Coupier, Beyond5G project; * with David Coupier, ANR GrHyDy. More informations can be found in the attached files. To be widely distributed, David Coupier

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bando dottorato "Methods and Models for Economic Decisions"
by Enrico Moretto 10 May '21

10 May '21

agli amministratori della lista Random; con la presente chiedo, se del caso, di inviare all'indirizzario RANDOM il seguente annuncio relativo al bando per l'ammissione al dottorato "Methods and Models for Economic Decisions", 37-esimo ciclo, offerto dal Dipartimento di Economia, Università dell'Insubria. Grazie mille. Cordiali saluti, enrico moretto *** Si informano i colleghi interessati, con preghiera di diffusione, che il bando del nuovo ciclo del dottorato "Methods and Models for Economic Decisions" è stato pubblicato sul sito internet dell'Ateneo dell'Insubria ed è disponibile ai seguenti link: https://www.uninsubria.it/la-didattica/dottorati-di-ricerca https://www.uninsubria.it/opportunita/ammissione-al-dottorato-methods-and-m… https://www.uninsubria.eu/programs/phd-doctoral-research Scadenza per le domande: 15 giugno. Cordiali saluti -- Dipartimento di Economia Università dell'Insubria #ChiarementeInsubria https://www.uninsubria.it/hpp/enrico.moretto

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LTI@Unito/CCA webinar in Quantitative Finance: “Self Inflicted Debt Crises”, Theo Dimpoulos (HEC Lausanne) | May 12, 2021 @12:00
by Luca Regis 07 May '21

07 May '21

Dear Colleagues, I am happy to share with you the following invitation to the Quantative Finance webinar organized by LTI@UniTO and Collegio Carlo Alberto, “Self Inflicted Debt Crises” by Theo Dimopoulos (HEC Lausanne), which will take place on Zoom on May 12, at 12.00. Below you find the Zoom link and an abstract of the presentation. Best regards, Luca Regis <#> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/4a6SaiafujNub6pHriwakj0wncDAbmtUwm…> <#> LTI@Unito and Fondazione Collegio Carlo Alberto are pleased to invite you to the next webinar <#> *May 12, 2021 | 12:00-13:15* *“Self Inflicted Debt Crises”* *Theo Dimopoulos (HEC Lausanne)* <#> *Abstract*: The restrictions on economic activity in the Covid-19 pandemic have led to a looming debt crisis. In a dynamic model of strategic default and debt renegotiation, we show how to resolve debt crises depending on borrowers’ time-inconsistent preferences. Myopic borrowers misprice their option to default by a U-shaped negative pricing error, which causes imperfect consumption smoothing, underinvestment in normal times, and risk shifting in crisis times. The model shows that bailouts need to be tailored to borrowers’ myopia, that lenders and borrowers ultimately self-inflict debt crises through their strategic interaction, that myopic distress can be cheaper to resolve than rational distress, and that myopia can be beneficial for rational agents. Optimal bailouts either punish or reward myopia through smaller or larger transfers, leading to procrastinated default and protracted crises or the reverse, depending on whether transfers exacerbate or alleviate the borrowers’ misperception of default risk. *Zoom Link*: https://us02web.zoom.us/j/86981911369?pwd=enM0c0lRM1BqOUhiNXJ1b1hoRUFkZz09 <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/hbrUdAY_KcHiYFp-zoUEFWWBp9T0Kg0cUl…> Meeting ID: 869 8191 1369 Passcode: 166986 <#> <#> <#> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/Kc1f2ufQnOOWcPREh0lKmL7Q4fzC6kZTEu…> <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/b-edRrCQzu0enNR_azA3LGWp3pL_izmv84…> <#> FONDAZIONE COLLEGIO CARLO ALBERTO Piazza Arbarello 8 - 10122 Torino, Italy phone: +390116705000 segreteria(a)carloalberto.org - www.carloalberto.org Facebook <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/Gt2401hi4FK-WGDLZAuu96sNqvjzd4A07j…> Twitter <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/dMAP2G9V5OGEVQgiZTVGvRpJC3GmNfL6Kc…> LinkedIn <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/ZfldktwuWczKYK5tZjUQN--QuFGPkzyS3J…> Instagram <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/lxHhxw7_pN8bfa4lRN1Ro0KNXDKFYNSqGI…> Youtube <https://4z5y5.r.a.d.sendibm1.com/mk/cl/f/toZ5omiJqAM-e_mmWMFepsHZKCAJ2-Skq2…> <#> *INFORMATION UNDER THE NEW GENERAL DATA PROTECTION REGULATION (GDPR)* Your personal information has been gathered for the exclusive purpose of informing you about the Collegio's initiatives, considering our and your legitimate interest or your consent. If you wish to have your personal data modified please contact Fondazione Collegio Carlo Alberto, piazza Arbarello 8, 1022 Torino, Italy - phone: +390116705000 - privacy(a)carloalberto.org *Unsubscribe* <https://4z5y5.r.a.d.sendibm1.com/mk/un/VBSMfA5QdgOL83sSDLP1ssvlYSrtMdGDR3mB…> <#> © 2021 Fondazione Collegio Carlo Alberto

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Phd Position at the Turin and Pau Universities
by Bruno Toaldo 07 May '21

07 May '21

The PhD School of the University of Turin, in the context of the PhD course in "Modeling and Data Science", offers: 1 PhD position on the project "Numerical approximations of non-local parabolic equations based on stochastic and finite elements methods and applications", starting on Nov 1, 2021. The project is a joint research initiative of the Stochastic group in the Dept. of Mathematics at the University of Turin (Italy) and the Numerical Analysis group in the "Laboratoire de Mathématique et de leurs applications" at the University of Pau (France). The advertised position will be based in both universities and will offer ample freedom to suitably organize the stay in the two cities. The possibility of double PhD Degree could be considered. The gross salary is 1458/month during the stay in Turin and could be increased of about 50% during the period in Pau. Embedded in a truly international environment, the student will get excellent research training in a structured programme focussing on challenges at the mathematical foundations of the stochastic and numerical approach to PDEs as well as on challenges arising from its various applications, e.g., in physics, biology, finance or data science. The combined expertise from the Turin and Pau groups will provide a significant breadth in depth and fertile ground for our student's ambitious research ideas. Successful candidates will have an MSc degree (or equivalent) in Mathematics (or a closely related field such as Applied Mathematics, Computational Science, Physics or Statistics), strong knowledge on stochastic processes or numerical methods, and feel eager to engage in the exchange of ideas with the teams in both Turin and Pau. For further information, please contact Bruno Toaldo: bruno.toaldo(a)unito.it -- Prima di stampare, pensa all'ambiente ** Think about the environment before printing Please don't send me Word or PowerPoint attachments if not absolutely necessary. See: http://www.gnu.org/philosophy/no-word-attachments.en.html <http://www.gnu.org/philosophy/no-word-attachments.html>

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Seminar announcement
by Marco Scarsini 07 May '21

07 May '21

Thursday, 13 May, 17:00 CEST *Yiling Chen,* Harvard University Forecast Aggregation via Peer Prediction <http://mailsender.luiss.it/lists/lt.php?id=cRpQBAIDSAULBwNOVgFdBQs> Discussants: Ville Satopää and Aris Filos-Ratsikas The paper can be found here <https://arxiv.org/abs/1910.03779>. This is the link to the Virtual Room <http://mailsender.luiss.it/lists/lt.php?id=cRpQAAYBSAULBwNOVgFdBQs>. If you want to receive the password to access the virtual room, please fill out this form <https://docs.google.com/forms/d/e/1FAIpQLSeDxM-M5ogG43elgjC-lNCp0BDhISiZHG0…> (If you filled it out in the past, this is not necessary). The schedule of the upcoming seminars can be found here <https://economiaefinanza.luiss.it/en/seminars/2020-2021-seminars>. ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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BAYSM 2021: extended deadline for registration & abstract submission
by Federico Camerlenghi 07 May '21

07 May '21

Dear all, This is a friendly reminder that the Bayesian Young Statisticians Meeting (BAYSM2021) will take place online on September 1-3, 2021. We are also happy to announce that the registration deadline has been extended to the end of May. The registration link is https://events.stat.uconn.edu/BAYSM2021/ . Although the conference will be free, registration is mandatory. Young researchers interested in giving a talk or presenting a poster are invited to *submit an extended abstract by May 31, 2021* during the registration process. Our decisions will be emailed by the end of June. *The extended abstract should be written according to the template and instructions provided on the registration page.* The template is downloadable from the "Resources" section on the website. For organizational reasons, we kindly ask all the interested researchers to register even if they just want to attend the meeting. The deadline for registration is again May 31, 2021. While the meeting is organized for and by junior Bayesians, attendance is open to anyone who may be interested. For more information, please visit the conference website: https://events.stat.uconn.edu/BAYSM2021/ Or write an email to baysm.isba(a)gmail.com On behalf of the BAYSM2021 organizing committee. -- Federico Camerlenghi Assistant Professor RTDb Department of Economics, Management and Statistics University of Milano Bicocca, Milano, Italy. web-page: https://www.unimib.it/federico-camerlenghi

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Pisa Online Seminars - Michael Högele and Alessandra Caraceni (Tuesday, May 11 at 16:00 and 17:00)
by Giacomo Filippo Di Gesu 06 May '21

06 May '21

Dear colleagues, I would like to invite you to the following online seminar organized by the Probability group of the University of Pisa. The two talks will be accessible under the link Click here to join<https://teams.microsoft.com/l/meetup-join/19:af3d635091e049579e555a84219ab3…"Tid":"c7456b31-a220-47f5-be52-473828670aa1","Oid":"dfd1e5f6-331d-43e0-a180-4bb6ce727fb7"}> Best regards, Giacomo Tuesday, May 11, 16:00 Speaker: Michael Högele (Universidad de los Andes) Title: Cutoff thermalization for Ornstein-Uhlenbeck systems with small Lévy noise in the Wasserstein distance Abstract: This talk presents recent results on cutoff thermalization (also known as the cutoff phenomenon) for a general class of asymptotically exponentially stable Ornstein-Uhlenbeck systems under ε-small additive Lévy noise. The driving noise processes include Brownian motion, α-stable Lévy flights, finite intensity compound Poisson processes and red noises and may be highly degenerate. Window cutoff thermalization is shown under generic mild assumptions, that is, we see an asymptotically sharp ∞/0-collapse of the renormalized Wasserstein distance from the current state to the equilibrium measure μ^ε along a time window centered in a precise ε-dependent time scale t_ε . In many interesting situations such as reversible (Lévy) diffusions it is possible to prove the existence of an explicit, universal, deterministic cutoff thermalization profile. The existence of this limit is characterized by the absence of non-normal growth patterns in terms of an orthogonality condition on a computable family of generalized eigenvectors of the matrix Q. With this piece of theory at hand this article provides a complete discussion of the cutoff phenomenon for the classical linear oscillator with friction subject to ε-small Brownian motion or α-stable Lévy flights. Furthermore, we cover the highly degenerate case of a linear chain of oscillators in a generalized heat bath at low temperature. Tuesday, May 11, 17:00 Speaker: Alessandra Caraceni (University of Oxford) Title: Polynomial mixing time for edge flips on planar maps Abstract: A long-standing problem proposed by David Aldous consists in giving a sharp upper bound for the mixing time of the so-called “triangulation walk”, a Markov chain defined on the set of all possible triangulations of the regular n-gon. A single step of the chain consists in performing a random edge flip, i.e. in choosing an (internal) edge of the triangulation uniformly at random and, with probability 1/2, replacing it with the other diagonal of the quadrilateral formed by the two triangles adjacent to the edge in question (with probability 1/2, the triangulation is left unchanged). While it has been shown that the relaxation time for the triangulation walk is polynomial in n and bounded below by a multiple of n^{3/2}, the conjectured sharpness of the lower bound remains firmly out of reach in spite of the apparent simplicity of the chain. For edge flip chains on different models – such as planar maps, quadrangulations of the sphere, lattice triangulations and other geometric graphs – even less is known. We shall discuss results concerning the mixing time of random edge flips on rooted quadrangulations of the sphere obtained in joint work with Alexandre Stauffer. A “growth scheme” for quadrangulations, which generates a uniform quadrangulation of the sphere by adding faces one at a time at appropriate random locations, can be combined with careful combinatorial constructions to build probabilistic canonical paths in a relatively novel way. This method has implications for a range of interesting edge-manipulating Markov chains on so-called Catalan structures, from “leaf translations” on plane trees to “edge rotations” on general planar maps. ************************ Giacomo Di Gesù Dipartimento di Matematica Università di Pisa Largo Bruno Pontecorvo 5 56127 - Pisa, Italy giacomo.digesu(a)unipi.it<mailto:giacomo.digesu@unipi.it> https://sites.google.com/site/giacomodigesu/

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bando per RTDB in SECS-S/06 a Pavia
by benedetta.ferrario 05 May '21

05 May '21

Presso il Dipartimento di Scienze Economiche e Aziendali dell'Università di Pavia è stato bandito un posto RTD-B nel settore SECS-S/06, consultabile al link http://wcm-3.unipv.it/site/home/ateneo/bandi-e-concorsi/concorsi-per-person… Scadenza presentazione domande: 3 giugno 2021 ore 12.00. Si prega di dare la massima diffusione presso tutti gli interessati.

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Seminar Aernout van Enter
by Massimo Campanino 05 May '21

05 May '21

Aernout van Enter ONE-SIDED VERSUS TWO-SIDED STOCHASTIC PROCESSES Thursday the 6th of May 3 pm (Italian time) Stochastic processes can be parametrised by time (such as occurs in Markov chains), in which case conditioning is one-sided (on the past) or by one-dimensional space (which is the case, for example, for one-dimensional Markov fields), where conditioning is two-sided (on the right and on the left). I will discuss some examples, in particular generalising this distinction to g-measures versus Gibbs measures, where, instead of a Markovian dependence, the weaker property of continuity (in the product topology) is considered. In particular I will discuss when the two descriptions (one-sided or two-sided) produce the same objects and when they are different. We show moreover the role one-dimensional entropic repulsion plays in this setting. Based on joint work with R. Bissacot, E. Endo and A. Le Ny, and S. Shlosman ________________________________ Zoom link https://unibo.zoom.us/s/98736182682?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJ… Join our Cloud HD Video Meeting<https://unibo.zoom.us/s/98736182682?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJ…> Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is a publicly traded company headquartered in San Jose, CA. unibo.zoom.us

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"SPDEs & friends" May 30, June 1-2
by Luisa Andreis 05 May '21

05 May '21

Dear colleagues, I forward this workshop announcement I’ve just received. Best regards, Luisa Andreis %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Dear all, We are organizing an online workshop on SPDEs which will take place from May 31st-June 2nd and feature many prominent speakers (Sandra Cerrai, Dan Crisan, Nina Holden, Nicolai Krylov, Jonathan Mattingly, Nicolas Perkowski, Jeremy Quastel, etc). http://page.math.tu-berlin.de/~tapia/spdes/ <https://l.facebook.com/l.php?u=http%3A%2F%2Fpage.math.tu-berlin.de%2F~tapia…> The basic plan is to have six 35-minute talks by different speakers per day, and each talk will be followed by a 15-minute discussion session. The participation is open to everyone, but for organizational purposes we would like to ask people who are interested in attending the workshop to complete the registration form https://forms.gle/G9Xw942iVNNgB4SLA <https://forms.gle/G9Xw942iVNNgB4SLA?fbclid=IwAR3iCpxoI2ACqgqUoSBjxpFsA8_2R1…> Please feel free to forward this email to interested friends, students, collaborators, and colleagues of yours! We are looking forward to seeing you at the event. Best regards, The organizers Oleg Butkovsky Peter Friz Nikolas Tapia

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Fwd: [owps] OWPS: talks tomorrow
by Faggionato, Alessandra 05 May '21

05 May '21

Buongiorno giro l'annuncio del OWPS di domani. Saluti Alessandra ---------- Forwarded message --------- Da: One World Probability <ow.probability(a)gmail.com> Date: mer 5 mag 2021 alle ore 08:12 Subject: [owps] OWPS: talks tomorrow To: <owps(a)lists.bath.ac.uk> Dear All, we have two talks tomorrow. Remember that we start 14:00 UTC which is 16:00 CET! 14:00-15:00 UTC Christina Goldschmidt The stable graph: the scaling limit of critical random graphs with i.i.d. random degrees having power-law tails Abstract: Consider a graph with label set \{1,2, \ldots,n\} chosen uniformly at random from those such that vertex i has degree D_i, where D_1, D_2, \ldots, D_n are i.i.d. strictly positive random variables. The condition for criticality (i.e. the threshold for the emergence of a giant component) in this setting is E[D^2] = 2 E[D], and we assume additionally that P(D = k) \sim c k^{-(\alpha + 2)} as k tends to infinity, for some \alpha \in (1,2). In this situation, it turns out that the largest components have sizes on the order of n^{\alpha/(\alpha+1)}. Building on earlier work of Adrien Joseph, we show that the components have scaling limits which can be related to a forest of stable trees (à la Duquesne-Le Gall-Le Jan) via an absolute continuity relation. This gives a natural generalisation of the scaling limit for the Erd\H{o}s-Renyi random graph (obtained in collaboration with Louigi Addario-Berry and Nicolas Broutin a few years ago, extending results of Aldous), which we call the stable graph. This complements recent work on random graph scaling limits by various authors including Bhamidi, Broutin, Duquesne, van der Hofstad, van Leeuwaarden, Riordan, Sen, M. Wang and X. Wang. 15:00 - 16:00 UTC Bénédicte Haas Distributional properties of the stable graphs Abstract: In this talk we will investigate some distributional properties of the connected components of the stable graphs introduced by Christina in the previous talk. We recall that for $\alpha \in (1,2]$, the $\alpha$-stable graph arises as the universal scaling limit of critical random graphs with i.i.d. degrees having an $\alpha$-dependent power-law tail behavior. Consider a connected component of such a graph. Our aim will be: (1) to describe the distribution of its kernel and more generally of its discrete finite-dimensional marginals, (2) to explicit its distribution as a collection of $\alpha$-stable trees glued on the kernel, and (3) present a line-breaking construction, in the same spirit as Aldous’ line-breaking construction of the Brownian CRT. Based on a joint work with Christina Goldschmidt and Delphin Sénizergues. The Zoom link is on the OWPS webpage. It can also be accessed directly via Zoom-link: https://tum-conf.zoom.us/j/68722718449 <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftum-conf.…> Meeting ID: 687 2271 8449 Passcode: 054920 We hope to see you tomorrow! Best wishes, Julien and Nina -- ************************************************* Prof. Alessandra Faggionato http://www1.mat.uniroma1.it/~faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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International Conference in Venice - CALL FOR PAPERS
by Monica Billio 04 May '21

04 May '21

20th INTERNATIONAL CONFERENCE CREDIT 2021 *Compound Risk: Climate, Disaster, Finance, Pandemic * Venice, Italy 23 –24 September 2021 * * *GRETA Associati* (Venice, Italy), *Cattolica Assicurazioni* (Verona, Italy), *European Datawarehouse *(Frankfurt, Germany), *European Investment Bank* (Luxembourg), *European Investment Fund *(Luxembourg) and *Intesa Sanpaolo *(Milan, Italy) are co-sponsors of a Conference to be held in Venice on September 23-24, 2021. The Conference CREDIT 2021 will bring together academics, practitioners and PhD students working in various areas of financial and credit risk with the aim to create a unique opportunity for participants to discuss research progress and policy and industry-relevant insights as well as directions for future research. Credit 2021 is the *twentieth *in a series of events dedicated to various aspects of credit risk and organised under the auspices of the *Department of Economics* and *VERA - Venice centre in Economic and Risk Analytics for public policies - of the Ca’ Foscari University of Venice*, *ABI - Italian Banking Association*,***AIAF - Associazione Italiana per l'Analisi Finanziaria* and the *Joint Research Center, European Commission* (Ispra, Italy). The theme of this year’s conference is the relation between financial risk on the one hand and pandemic, climate and disaster risk, on the other hand, with particular attention to the possible compounding of different sources of risk. The past year, 2020, has been marked by the still-ongoing COVID-19 pandemic crisis, which has shown how fragile our economic systems can be when confronted with shocks that threaten public health and the closeness of the connections between economic and financial risks and public policy. Climate change is now widely recognized as a new source of financial risk which is relevant both at the level of households and individual institutions and the systemic level. In particular, the many central banks and financial institutions that have joined the Network for Greening the Financial System (NGFS) have issued recommendations on how to integrate climate considerations into risk management strategies and practices. However, risks such as pandemics and climate change do not occur in isolation but can also compound, as has already been seen in several countries. The compounding of risk, which is currently poorly understood, increases the complexity of risk assessment and risk management, and it has implications for socio-economic development, as well as for public debt sustainability. In the EU, these aspects have major implications for efforts to increase the resilience of the economy to future shocks and to “build back better”, and requires the alignment of COVID-19 recovery policies, such as those supported by the NextGenerationEU, and the EU Green Deal and the Paris Agreement targets. The organizers of CREDIT 2021 encourage submissions on a range of topics of relevance to this year’s theme including: finance and COVID-19; finance and climate risks; finance and compound COVID-19 and climate risks. In particular, submissions are welcome in the following areas: • INVESTMENTS: Sustainable Finance, Disaster risk finance; Finance 4 good; public finance; blended finance. • POLICIES: Climate Policies, European Green New Deal; Next Generation EU; Recovery Plan. • INFORMATION: Data gaps; modelling challenges; risk transmission channels; uncertainty; complexity. The final program will include both submitted and invited papers. Acceptances received so far from invited speakers include *Vittoria Colizza *(INSERM, France), *Robert Engle *(Stern Business School, New York University) and *Roberto Rigobon* (MIT Sloan School of Management) who will deliver keynotes, respectively on finance and on epidemics. The Conference will also feature panel discussions on researchers', practitioners' and policy makers’ views of the major issues at stake. The SCIENTIFIC COMMITTEE for the Conference consists of: • * Stefano Battiston *(Ca’ Foscari University of Venice & University of Zurich, Programme Chair) • * Monica Billio *(Ca’ Foscari University of Venice & GRETA) • * Francesca Campolongo *(Joint Research Center, European Commission) • *Vittoria Colizza* (INSERM, France) • * Helmut Kraemer-Eis* (European Investment Fund) • * Jan Pieter Krahnen* (Leibniz Institute for Financial Research SAFE & Goethe University, Frankfurt) • *Irene Monasterolo *(Vienna University of Economics and Business) • *Steven Ongena* (University of Zurich, Swiss Finance Institute, KU Leuven & CEPR) • *Roberto Rigobon* (MIT Sloan School of Management) • *Stephen Schaefer* (London Business School) CALL FOR PAPERS Those wishing to present a paper at the Conference should submit by *May 31, 2021 *to the address given below (preferably in electronic format). Please indicate to whom correspondence should be addressed. Decisions regarding acceptance will be made by *June 30, 2021*. The final version of accepted papers must be received by August 31, 2021. Please send papers to: GRETA Associati, San Polo, 2605 - 30125 Venice, ITALY Phone : +39 041 5238178 - e-mail: credit(a)greta.it <mailto:credit@greta.it> More detailed information available on the Conference website: https://www.greta.it/index.php/it/credit-2021 <https://www.greta.it/index.php/it/credit-2021>

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Open PhD position in Mathematics at Vrije Universiteit Amsterdam
by Alessandro Zocca 04 May '21

04 May '21

Dear colleagues, There is an open fully-funded 4-year PhD position under my supervision at the Department of Mathematics of Vrije Universiteit Amsterdam. The PhD project will focus on learning and stochastic optimization for power networks, which are increasingly affected by uncertainty due to a quickly growing adoption of renewable energy sources. The project aims at using and expanding mathematical knowledge to better understand and optimize these complex networks, especially in combination with the large amount of newly-available data. The PhD candidate will use modern methods in (stochastic) optimization, applied probability, operations research, and learning theory to develop both new theory and algorithms. The preferred starting date is September 1, 2021. The candidates are expected to have a Master's degree in Mathematics or Operations Research, and a solid background in stochastics and optimization. For more information (including eligibility criteria, salary, and employment conditions) see https://workingat.vu.nl/ad/phd-position-on-learning-and-stochastic-optimiza…. Please apply online at the same link, the deadline is June 1, 2021, but early applications are encouraged. If you have any further questions regarding this vacancy, feel free to reach out to me by email at a.zocca(a)vu.nl. Please feel free to advertise this position further and bring it to the attention of potentially interested candidates. Thank you in advance. Best wishes, Alessandro ================================= Alessandro Zocca (he/his) Assistant Professor Vrije Universiteit Amsterdam Department of Mathematics https://sites.google.com/site/zoccaale/

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(PMS)^2 online talk: Guangqu Zheng, Monday May 10 at 17:30
by Maurizia Rossi 03 May '21

03 May '21

Dear colleagues, We are happy to announce the following online talk: Speaker: *Guangqu Zheng* (University of Kansas) Title: *Malliavin derivatives of hyperbolic Anderson model with applications to its absolute continuity and spatial averages.* Date and time: *Monday May 10, 17:30-18:30 (Rome time zone)* Abstract: see below. Zoom link: https://us02web.zoom.us/j/83843864962?pwd=NlNadHhIRkdzYUErZWJpbTNJaytDUT09 Meeting ID: 838 4386 4962 Passcode: 5gVVXb This talk is the second of the *(PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics* organized jointly by the universities Milano-Bicocca, Pavia, Milano-Politecnico and Milano-Statale. Participation is free and welcome! (though limited to 100 participants for technical reasons) Best regards The organizers (Mario Maurelli, Carlo Orrieri, Maurizia Rossi, Margherita Zanella) *Abstract:* In this talk, we present recent work on the hyperbolic Anderson model driven by a space-time colored Gaussian homogeneous noise with spatial dimension one and two. Under mild assumptions, we provide Lp-estimates of the iterated Malliavin derivatives of the solution in terms of the fundamental solution of the wave solution. We present two applications: (1) We present quantitative central limit theorems for spatial averages of the solution to the hyperbolic Anderson model, where the rates of convergence are described by the total variation distance. These quantitative results have been elusive so far due to the temporal correlation of the noise blocking us from using the Itô calculus. (2) We establish the absolute continuity of the law for the hyperbolic Anderson model. The Lp-estimates of Malliavin derivatives are crucial ingredients to verify a local version of Bouleau-Hirsch criterion for absolute continuity. Our approach substantially simplifies the arguments for the one-dimensional case, which has been studied in the recent work by Balan, Quer-Sardanyons and Song (2019). This talk is based on the joint work (arXiv:2101.10957) with *R. Balan*, *D. Nualart* and *L. Quer-Sardanyons* (2021). - - - Maurizia Rossi Dipartimento di Matematica e Applicazioni Università di Milano-Bicocca

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Seminar Antonio Linero @Bocconi - May 6th
by Giacomo Zanella 03 May '21

03 May '21

We announce the following DEC Statistics webinar at Bocconi: Date: Thursday, May 6, h17:00 (Italy time) Speaker: Antonio Linero (UT Austin) Title: Bayesian Decision Tree Ensembling Strategies for Nonparametric Problems Abstract: In this talk we will make the case for using Bayesian decision tree ensembles, such as Bayesian additive regression trees (BART), for addressing some fully-nonparametric problems. We present models for density regression and survival analysis, and argue that our approaches are both easier to use and more effective than more standard Bayesian nonparametric solutions (such as those based on mixture models). On the applied side, we show how to use our models to extract interesting features across several datasets. On the theoretical side, we also show that our models attain minimax-optimal rates of convergence of the posterior in high-dimensional settings. Throughout the talk, we will emphasize the flexibility and ease-of-use of our approach: all simulation and real data analyses attain excellent results using heuristically chosen "default" priors, and it is quite straight-forward for researchers (both in-principle and in-practice) to embed our ensembles in larger models. The webinar will be on zoom at: https://zoom.us/j/95265599865?pwd=NlEwVWFjNktjNkx5VjZFZmFLVGh0UT09 Meeting ID: 952 6559 9865 Passcode: 634366 Kind regards, Giacomo Zanella

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Fwd: PhD and postdoc position
by Francesco Caravenna 30 Apr '21

30 Apr '21

Ricevo e inoltro. > Da: Martina Hofmanova <hofmanova(a)math.uni-bielefeld.de> > Oggetto: PhD and postdoc position > Data: 30 aprile 2021 11:04:15 CEST > > Dear colleagues, > > I would like to draw your attention to the open positions (1 postdoc, 1 PhD student) in my group (the starting date is flexible) > > https://uni-bielefeld.hr4you.org/job/view/466/research-position?page_lang=en <https://uni-bielefeld.hr4you.org/job/view/466/research-position?page_lang=en> > > https://uni-bielefeld.hr4you.org/job/view/477/research-position?page_lang=en <https://uni-bielefeld.hr4you.org/job/view/477/research-position?page_lang=en> > > I would be happy if you could share the information further and forward it to possible candidates. > > Thank you in advance. > > Best regards, > Martina

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Seminar announcement
by Marco Scarsini 30 Apr '21

30 Apr '21

Thursday, 5 May, 17:00 CEST *Marta Blangiardo,* Imperial College Estimating Weekly Excess Mortality at Sub-National Level in Italy during the COVID-19 Pandemic <http://mailsender.luiss.it/lists/lt.php?id=cRpQBAcGSAULAwdOVgFdBQs> Discussants: Marcus Ebeling and Javier Rubio This is the link to the Virtual Room <http://mailsender.luiss.it/lists/lt.php?id=cRpQAAYBSAULAwdOVgFdBQs>. If you want to receive the password to access the virtual room, please fill out this form <https://docs.google.com/forms/d/e/1FAIpQLSeDxM-M5ogG43elgjC-lNCp0BDhISiZHG0…> (If you filled it out in the past, this is not necessary). The schedule of the upcoming seminars can be found here <https://economiaefinanza.luiss.it/en/seminars/2020-2021-seminars>. ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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Fwd: Post-Doc position at the University of Basel
by Francesco Caravenna 30 Apr '21

30 Apr '21

Ricevo e inoltro. > Da: David Belius <david.belius(a)unibas.ch> > Oggetto: Post-Doc position at the University of Basel > Data: 22 aprile 2021 14:39:55 CEST > > Dear Colleagues, > > I am looking to fill a Post-Doc position at the University of Basel in Switzerland funded by my Swiss National Science Foundation Project "Hierarchical Structure and the Extrema of Correlated Random Fields". The candidate will work with myself, my group and my collaborators on high dimensional statistical physics problems such as the Sherrington-Kirkpatrick and related models. Topics will include critical point complexity and the development of a mathematically rigorous TAP approach. > > The starting date is 1 September 2021 (there is a bit of flexibility) with a planned duration of two years. Candidates should contact me by e-mail with a CV. Please forward this e-mail to anyone you think may be interested, and feel free to contact me about potential candidates directly. > > Best Regards, > David Belius > > -- > _______________________________ > David Belius | SNF Professor > Department of Mathematics and Computer Science | University of Basel > david.belius(a)unibas.ch <mailto:david.belius@unibas.ch> | +41 61 207 55 82 | Spiegelgasse 1, 4051 Basel, Switzerland > https://probability.dmi.unibas.ch/belius <https://probability.dmi.unibas.ch/belius>

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Corso on Frequency domain approach to time series analysis
by Elvira Di Nardo 30 Apr '21

30 Apr '21

Cari colleghi, nell’ambito del programma di Visiting Professors della Laurea Magistrale in Stochastics and Data Science dell’Università di Torino (programma completo alla pagina https://www.master-sds.unito.it/go/visiting) verrà svolto il seguente corso on-line: -------------------------------------- Luis Alberiko Gil-Alana (University of Navarra, Spain) A FREQUENCY DOMAIN COURSE ON TIME SERIES ANALYSIS This course deals with the analysis of time series. After a short review in the time domain, focusing on aspects such as autocovariances, estimation, testing, Box-Jenkins methodology, seasonality, prediction and non-stationary issues, the course will focus on the frequency domain, introducing the spectral distribution function or spectrum along with the spectral density function, the periodogram and other issues such as long memory processes. -------------------------------------- Il corso si svolgerà online secondo il seguente calendario - mar 4 Maggio, h.11.15-13.15 - ven 7 Maggio, h.10.15-12.15 - mar 11 Maggio, h.11.15-13.15 - ven 14 Maggio, h.10.15-12.15 - mar 18 Maggio, h.11.15-13.15 - ven 21 Maggio, h.10.15-12.15 - mar 25 Maggio, h.11.15-13.15 - ven 28 Maggio, h.10.15-12.15 Il corso è rivolto agli studenti della Laurea Magistrale ma la partecipazione è aperta a tutti gli interessati. Chi fosse interessato, può contattarmi privatamente (elvira.dinardo(a)unito.it) per essere incluso nella lista dei partecipanti e ricevere il collegamento Webex. Cordiali saluti, Elvira Di Nardo -- %------------------------------------------------------- Elvira Di Nardo Dept. Mathematics "G. Peano" University of Torino Via Carlo Alberto 10 10123 Torino, Italia tel. +39 0116702862 fax +39 0116702878 http://www.elviradinardo.it %-------------------------------------------------------

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IMPORTANT: Seminar announcement - Petter Kolm (April 28 at 4 pm) CANCELLED
by Giulia Livieri 28 Apr '21

28 Apr '21

Dear all, We are very sorry for the short notice. Unfortunately, we have to postpone — the date will be communicated soon — the seminar of today for a last-minute setback of the speakers; He is really sorry for this. We will communicate the new date for the latter by Petter Kolm soon. Sorry again, Best, Giulia

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Fwd: [owps] talks tomorrow april 29
by Faggionato, Alessandra 28 Apr '21

28 Apr '21

Buongiorno, giro l'annuncio del OWPS per chi fosse interessato. Saluti Alessandra ---------- Forwarded message --------- Da: One World Probability <ow.probability(a)gmail.com> Date: mer 28 apr 2021 alle ore 14:04 Subject: [owps] talks tomorrow april 29 To: <owps(a)lists.bath.ac.uk> Dear All, we have two talks tomorrow. Remember that we start 14:00 UTC which is 16:00 CET! 14:00-15:00 UTC Bastien Mallein Tail behaviour of the derivative martingale in a branching random walk A branching random walk is a discrete-time particle system on the real line in which every particle gives independently birth to offspring positioned around the position of their parent. The derivative martingale of the branching random walk is a stochastic process which allows to measure the number of particles traveling at maximal speed in this process. Under some general integrability conditions uncovered by Aïdékon (2013) and Chen (2015), we know the derivative martingale converges a.s. to a non-negative limit. Recently, Maillard and Pain (2019) obtained a necessary and sufficient condition on the reproduction law of the branching Brownian motion under which the convergence of the derivative martingale satisfies a specific central limit theorem. In this talk, based on a joint work with Alexander Iksanov and Dariusz Buraczewski, we extend their result to branching random walk settings. The proof is based on the characterization of subharmonic functions of the killed random walk with at most linear growth. 15:00 - 16:00 UTC Hui He Deviation probabilities for the maximum of a branching random walk. Consider a supercritical branching random walk on real line started from the origin. Under some mild conditions, it is proved by Aïdékon (2013) that its centered maximum converges in law. In this talk, we will review some recent results on the large/lower deviation probabilities of the maximum. The talk is based on joint works with Xinxin Chen and Bastien Mallein. The Zoom link is on the OWPS webpage. It can also be accessed directly via https://tum-conf.zoom.us/j/66226509320 <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftum-conf.…> Meeting-ID: 662 2650 9320 Kenncode: 710554 We hope to see you tomorrow! Best wishes, Julien and Nina ID: 662 2650 932 -- ************************************************* Prof. Alessandra Faggionato http://www1.mat.uniroma1.it/~faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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Seminar Aernout van Enter
by Massimo Campanino 28 Apr '21

28 Apr '21

Aernout van Enter ONE-SIDED VERSUS TWO-SIDED STOCHASTIC PROCESSES Thursday the 6th of May 3 pm (Italian time) Stochastic processes can be parametrised by time (such as occurs in Markov chains), in which case conditioning is one-sided (on the past) or by one-dimensional space (which is the case, for example, for one-dimensional Markov fields), where conditioning is two-sided (on the right and on the left). I will discuss some examples, in particular generalising this distinction to g-measures versus Gibbs measures, where, instead of a Markovian dependence, the weaker property of continuity (in the product topology) is considered. In particular I will discuss when the two descriptions (one-sided or two-sided) produce the same objects and when they are different. We show moreover the role one-dimensional entropic repulsion plays in this setting. Based on joint work with R. Bissacot, E. Endo and A. Le Ny, and S. Shlosman ________________________________ Zoom link https://unibo.zoom.us/s/98736182682?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJ… Join our Cloud HD Video Meeting<https://unibo.zoom.us/s/98736182682?zak=eyJ6bV9za20iOiJ6bV9vMm0iLCJhbGciOiJ…> Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is a publicly traded company headquartered in San Jose, CA. unibo.zoom.us

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Padova Online Seminar by Gioia Carinci (Università di Modena e Reggio Emilia) [Friday, May 7 at 14.30]
by alessandra bianchi 28 Apr '21

28 Apr '21

Dear Colleagues, We would like to invite you to the following Probability seminar that will take place on May 7 at 14.30 by the zoom platform. ________________________________________________________ Speaker: Gioia Carinci (Università di Modena e Reggio Emilia) Title: Condensation of SIP particles and sticky Brownian motion 7 MAY (Friday) - 14:30 zoom link: TBA available on the webpage https://www.math.unipd.it/~bianchi/seminari/ ) Abstract: The symmetric inclusion process (SIP) is a particle system with attractive interaction. We study its behavior in the condensation regime attained for large values of the attraction intensity. Using Mosco convergence of Dirichlet forms, we prove convergence to sticky Brownian motion for the distance of two SIP particles. We use this result to obtain, via duality, an explicit scaling for the variance of the density field in this regime, for the SIP initially started from a homogeneous product measure. This provides relevant new information on the coarsening dynamics of condensing particle systems on the infinite lattice. Joint works with M. Ayala, C Giardina and F. Redig -- Alessandra Bianchi Dip. di Matematica Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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webinars PRISMA Biagini-Colaneri
by c.ceci＠unich.it 26 Apr '21

26 Apr '21

Buongiorno a tutti, abbiamo il piacere di annunciare il quarto appuntamento del ciclo di seminari online promosso dal Gruppo UMI PRISMA. May 3,2021 - 16:00-17:00 (CET) Francesca Biagini Reduced-form setting under model uncertainty with non-linear affine Intensities. - 17:00-18:00 (CET) Katia Colaneri Classical solutions of the Backward PIDE for Markov modulated Marked Point Processes and applications to catastrophic bonds. Abstract Francesca Biagini: In this talk we present a market model including financial assets and life insurance liabilities within a reduced-form framework under model uncertainty by following [1]. In particular we extend this framework to include mortality intensities following an affine process under parameter uncertainty, as defined in [2].This allows both to introduce the definition of a longevity bond under model uncertainty in a consistent way with the classical case under one prior, as well as to compute it by explicit formulas or by numerical methods. We also study conditions to guarantee the existence of a càdlàg modification for the longevity bond’s value process. Furthermore, we show how the resulting market model extended with the longevity bond is arbitrage-free and study arbitrage-free pricing of contingent claims or life insurance liabilities in this setting. This talk is based on: [1] Francesca Biagini and Yinglin Zhang. Reduced-form framework under model uncertainty. The Annals of Applied Probability, 29(4):2481–2522, 2019. [2] Francesca Biagini and Katharina Oberpriller. Reduced-form framework under model uncertainty. Preprint University of Munich and Gran Sasso Science Institute, 2020. [3] Tolulope Fadina, Ariel Neufeld, and Thorsten Schmidt. Affine processes under parameter uncertainty. Probability, Uncertainty and Quantitative Risk <https://link.springer.com/journal/41546> volume 4 (5), 2019. Abstract Katia Colaneri: We give conditions ensuring that the backward partial integro differential equation (PIDE) associated with a multidimensional jump-diffusion with a pure jump component has a unique classical solution. Our proof uses a probabilistic arguments and extends the results of (Pham 1998) to processes with a pure jump component where the jump intensity is modulated by a diffusion process. This result is particularly useful in some applications to pricing and hedging of financial and actuarial instruments, and we provide an example to pricing of catastrophic (CAT) bonds. Collegamento Teams: https://teams.microsoft.com/l/meetup-join/19%3ad685b25ed15f4821ac5168e63cf9… Tutte le informazioni le trovate anche alla pagina http://www.umi-prisma.polito.it/webinars.html Grazie per l’attenzione, Claudia Ceci e Domenico Marinucci ******************************************** Claudia Ceci Dipartimento di Economia Universita' "G. d'Annunzio" di Chieti-Pescara V.le Pindaro 42 65127, Pescara, ITALY c.ceci(a)unich.it *******************************************

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Seminar announcement - Petter Kolm (April 28 at 4 pm)
by Fabrizio Lillo 25 Apr '21

25 Apr '21

*Wednesday April 28 at 4pm (CEST):* Petter Kolm (NYU, Courant Institute) *Title*: Feature Selection in Jump Models *Abstract*: Jump models switch infrequently between states to fit a sequence of data while taking the ordering of the data into account. In this talk, we propose a new framework for joint feature selection, parameter and state-sequence estimation in jump models. Feature selection is necessary in high-dimensional settings where the number of features is large compared to the number of observations and the underlying states differ only with respect to a subset of the features. We develop and implement a coordinate descent algorithm that alternates between selecting the features and estimating the model parameters and state sequence, which scales to large data sets with large numbers of (noisy) features. We demonstrate the usefulness of the proposed framework by comparing it with a number of other methods on both simulated and real data in the form of financial returns, protein sequences, and text. The resulting sparse jump model outperforms all other methods considered and is remarkably robust to noise. This is joint work with Erik Lindstrom and Peter Nystrup The link for joining the meeting is: https://teams.microsoft.com/l/meetup-join/19%3ameeting_NjVmYWI3OTMtZWZkYy00… Best regards Fabrizio Lillo ---------------------------------------- Fabrizio Lillo Dipartimento di Matematica, Università di Bologna Scuola Normale Superiore, Pisa ITALY Personal website: fabriziolillo.wordpress.com University website: www.unibo.it/sitoweb/fabrizio.lillo <http://fabriziolillo.wordpress.com/> phone: +39 050509159

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Seminar announcement
by Marco Scarsini 23 Apr '21

23 Apr '21

Thursday, 29 April, 17:00 CEST *Carri Chan,* Columbia University Prediction-Driven Surge Planning with Applications in the Emergency Department <http://mailsender.luiss.it/lists/lt.php?id=cRpQBwwLSAULAAdOVgFdBQs> Optimizing emergency department (ED) nurse staffing decisions to balance the quality of service and staffing cost can be extremely challenging, especially when there is a high level of uncertainty in patient-demand. Increasing data availability and continuing advancements in predictive analytics provide an opportunity to mitigate demand-rate uncertainty by utilizing demand forecasts. In this work, we study a two-stage prediction framework that is synchronized with the base (made months in advance) and surge (made nearly real-time) staffing decisions in the ED. We quantify the benefit of the more expensive surge staffing. We also propose a near-optimal two-stage staffing policy that is straightforward to interpret and implement. Lastly, we develop a unified framework that combines parameter estimation, real-time demand forecasts, and staffing in the ED. High fidelity ED simulation experiments demonstrate that the proposed framework can reduce staffing costs by 8% – 17% while guaranteeing timely access to care. Joint work with Jing Dong and Yue Hu. Discussants: Vahid Sarhangian and Julien Grand-Clément This is the link to the Virtual Room <http://mailsender.luiss.it/lists/lt.php?id=cRpQAAYBSAULAAdOVgFdBQs>. If you want to receive the password to access the virtual room, please fill out this form <https://docs.google.com/forms/d/e/1FAIpQLSeDxM-M5ogG43elgjC-lNCp0BDhISiZHG0…> (If you filled it out in the past, this is not necessary). The schedule of the upcoming seminars can be found here <https://economiaefinanza.luiss.it/en/seminars/2020-2021-seminars>. ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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Webinar "Near-maxima and near-records", by F. Javier López Lorente
by Antonio DI CRESCENZO 23 Apr '21

23 Apr '21

---------- Forwarded message --------- Dear colleagues, We kindly invite you to attend the SPA Webinar *"Near-maxima and near-records"*, by F. Javier López Lorente (Universidad de Zaragoza, Spain), on April 29, 2021, Thursday, at 16:30 p.m. (UTC+2). You may read the abstract at: blogs.mat.ucm.es/presa/our-webinar If you wish to attend this SPA Webinar, please send an email to the organizers (agcorral(a)ucm.es) You will receive an email with the link to access the seminar a few hours before the seminar starts. The SPA Webinar Series is organized by the Working Group on *"Stochastic Processes and their Applications"* of the Spanish Society for Statistics and Operations Research. With best regards, Miguel González Velasco & Antonio Gómez-Corral *Coordinators of the Working Group* -- *Antonio Gómez-Corral* Facultad de Ciencias Matemáticas Plaza de Ciencias 3 Universidad Complutense de Madrid 28040 Madrid Teléfono: +34 91 394 44 28 E-mail: agcorral(a)ucm.es Web page: blogs.mat.ucm.es/agomez-corral Las matemáticas de la pandemia (CSIC-Catarata, 2020): blogs.mat.ucm.es/agomez-corral/2020/11/07/las-matematicas-de-la-pandemia/ Antes de imprimir este correo piense si es necesario: el medio ambiente es cosa de todos. Before printing this mail please consider whether it is really necessary: the environment is a concern for us all.

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Webinar in Statistics MATTHIAS LOFFLER
by Pierpaolo De Blasi 23 Apr '21

23 Apr '21

WEBINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.carloalberto.org/events/category/seminars/seminars-in-statistic…> Venerdi 30 Aprile 2021, alle ore 12.00, si terrà il seguente webinar: ------------------------------------------------ Speaker: *Matthias Loffler *(ETH Zurich) Title: *Optimality of Spectral Clustering in the Gaussian Mixture Model* Zoom link: https://us02web.zoom.us/j/81943504316?pwd=anlwTXpXSkU4R1ZsMjMxVEo5NHcwQT09 Meeting ID: 819 4350 4316 Passcode: 355115 Abstract: Spectral clustering is one of the most popular algorithms to group high dimensional data. It is easy to implement and computationally efficient. Despite its popularity and successful applications, its theoretical properties have not been fully understood. We show that spectral clustering is minimax optimal in the Gaussian Mixture Model with isotropic covariance matrix, when the number of clusters is fixed and the signal-to-noise ratio is large enough. Spectral gap conditions are widely assumed in the literature to analyze spectral clustering. On the contrary, we show that these conditions are not needed. ------------------------------------------------ Il webinar è organizzato dalla "de Castro" Statistics Initiative www.carloalberto.org/stats Cordiali saluti, Pierpaolo De Blasi --- University of Torino & Collegio Carlo Alberto carloalberto.org/pdeblasi <https://sites.google.com/a/carloalberto.org/pdeblasi/>

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Post-doc position available at the University of Oslo, Norway. Deadline approaching!
by Valeria Vitelli 22 Apr '21

22 Apr '21

*A three-years postdoc position in Biostatistics is offered at the Oslo Centre for Biostatistics and Epidemiology (OCBE), University of Oslo, Norway. * The position is funded under the* SCIENTIA FELLOWS* program, a transnational research fellowship programme in the field of Health Life Sciences at the University of Oslo, funded by the EU Horizon 2020 under the Maria Skłodowska-Curie scheme. *More information available here:* https://www.med.uio.no/imb/english/research/groups/statistics-high-dimensio… *Hosts: *Valeria Vitelli ( https://www.med.uio.no/imb/english/people/aca/valeriv/) and David Swanson ( https://sojourningnorth.github.io/) *Deadline for submission: May 11th, 2021* *Call, detailed information and how to apply:* (thematic area: "biostatistics") https://www.med.uio.no/english/research/scientia-fellows/apply/ *If you are interested in the position, please contact the hosts above as soon as possible! *In order to apply for the position, you have to submit a research proposal (and other documents as specified in the call) by May 11th, 2021. The position will be at the Oslo Centre for Biostatistics and Epidemiology (OCBE), Faculty of Medicine, University of Oslo ( https://www.med.uio.no/imb/english/research/centres/ocbe/) *Salary: 526 000 NOK/year (roughly 52K EUR/year)* *Eligibility:* - You possess a PhD degree (at the latest by 1 July 2021) in statistics, biostatistics, mathematics, computer science or other related disciplines with a documented competence in statistics, biostatistics or mathematics. - You have not been resident in Norway for more than 12 months in the last 3 years. -- Valeria Vitelli Oslo Center for Biostatistics and Epidemiology, Department of Biostatistics, University of Oslo, Norway mailto: valeria.vitelli(a)medisin.uio.no

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Summer School - Stochastic Models and Complex Systems
by Barbara Martinucci 22 Apr '21

22 Apr '21

Dear All, We are glad to announce the forthcoming Summer School, entitled *"Stochastic Models and Complex Systems"*, that will be held online in the period June 10th - July 7th, 2021. The Summer School is open to PhD students, postdoc and young researchers interested in the treated topics. It will feature mini-courses of plenary speakers, exercise sessions and students' talks. *Plenary courses *include: - *Enrico Scalas* (University of Sussex) "*A gentle introduction to combinatorial stochastic processes (with applications to Physics, Finance and Economics)*", 16 hours; - *Yuliia Mishura* (Taras Shevchenko National University of Kyiv) "*Statistics of fractional models*", 8 hours; - *Jorge Navarro* (University of Murcia) "*Selected Topics on Distorted models and applications*", 6 hours. An outline of the event, including the themes covered, is already available on the website http://dipmat2.unisa.it/iniziative/smocs2020/School.html The students willing to apply for the Summer School are invited to fill the registration form available on the website. The participation is free but the registration is mandatory. Only the first 50 registration will be admitted. For any question, send an email to: smocs2021(a)gmail.com Do not hesitate to CIRCULATE this announcement to your colleagues and students. Best regards, the Organizing Committee

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2nd Spring Colloquium on Probability and Finance
by Claudio Fontana 22 Apr '21

22 Apr '21

Dear all, We would like to bring to your attention the following virtual workshop: /2ND SPRING COLLOQUIUM ON PROBABILITY AND FINANCE - /29 APRIL 2021, 9.00 - 13.00, ONLINE University of Padova, Department of Mathematics "Tullio Levi-Civita" The second edition of the Spring Colloquium on Probability and Finance will bring together researchers working in stochastic analysis and mathematical finance. The workshop will feature five invited talks and attendance is open. To attend the Colloquium, please register by sending an e-mail to the organisers (Giorgia Callegaro and Claudio Fontana). _SPEAKERS_: • René AID (Paris Dauphine Universty, FR) • Luciano CAMPI (University of Milan, IT) • Alessandro GNOATTO (University of Verona, IT) • Antoine JACQUIER (Imperial College London, UK) • Barbara PACCHIAROTTI (University of Rome "Tor Vergata", IT) Best regards, Giorgia Callegaro and Claudio Fontana

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Pisa Online Seminars - Constanza Rojas-Molina (Tuesday, April 27 at 16:00)
by Giacomo Filippo Di Gesu 21 Apr '21

21 Apr '21

Dear colleagues, I would like to invite you to the following online seminar organized by the Probability group of the University of Pisa. The talk will be accessible under the link Click here to join<https://teams.microsoft.com/l/meetup-join/19:af3d635091e049579e555a84219ab3…"Tid":"c7456b31-a220-47f5-be52-473828670aa1","Oid":"dfd1e5f6-331d-43e0-a180-4bb6ce727fb7"}> Best regards, Giacomo Tuesday, April 27, 16:00 Speaker: Constanza Rojas-Molina (CY Cergy Paris Université) Title: (Fractional) random Schrödinger operators, integrated density of states and localization Abstract: We consider the continuous Schrödinger operator - d^2/d^x^2 + B’(x) on the interval [0,L] where the potential B’ is a white noise. We study the entire spectrum of this operator in the large L limit. We prove the joint convergence of the eigenvalues and of the eigenvectors and describe the limiting shape of the eigenvectors for all energies. When the energy is much smaller than L, we find that we are in the localized phase and the eigenvalues are distributed as a Poisson point process. The transition towards delocalization holds for large eigenvalues of order L. In this regime, we show the convergence at the level of operators. The limiting operator in the delocalized phase is acting on R^2-valued functions and is of the form ``J \partial_t + 2*2 noise matrix'' (where J is the matrix ((0, -1)(1, 0))), a form appearing as a conjecture by Edelman Sutton (2006) for limiting random matrices. Joint works with Cyril Labbé. ************************ Giacomo Di Gesù Dipartimento di Matematica Università di Pisa Largo Bruno Pontecorvo 5 56127 - Pisa, Italy giacomo.digesu(a)unipi.it<mailto:giacomo.digesu@unipi.it> https://sites.google.com/site/giacomodigesu/

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(PMS)^2 online talk: Zdzislaw Brzezniak, Monday April 26 at 17:30
by Mario Maurelli 21 Apr '21

21 Apr '21

Dear colleagues, We are happy to announce the following online talk: Speaker: *Zdzislaw Brzezniak* (University of York, UK) Title: *The stochastic Strichartz estimates and stochastic nonlinear Schrödinger equations driven by Levy noise* Date and time: *Monday April 26, 17:30-18:30 (Rome time zone)* Abstract: see below Zoom link: https://us02web.zoom.us/j/87131794820?pwd=R3l0VEtpZXNzUmQ1bnlnbWhBUm5XQT09 Meeting ID: 871 3179 4820 Passcode: 5yFGwK This talk is the first of the *(PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics* organized jointly by the universities Milano-Bicocca, Pavia, Milano-Politecnico and Milano-Statale. The series will run approximately every fortnight and, for the moment, will be held online. Participation is free and welcome! (though limited to 100 participants for technical reasons) Best regards The organizers (Mario Maurelli, Carlo Orrieri, Maurizia Rossi, Margherita Zanella) Abstract: We establish a new version of the stochastic Strichartz estimate for the stochastic convolution driven by jump noise which we apply to the stochastic nonlinear Schrodinger equation with nonlinear multiplicative jump noise in the Marcus canonical form. With the help of the deterministic Strichartz estimates, we prove the existence and uniqueness of a global solution to stochastic nonlinear Schrodinger equation in $L^2(R^n)$ with either focusing or defocusing nonlinearity in the full subcritical range of exponents as in the deterministic case. This talk will be based on a joint paper with Wei Liu and Jiahui Zhu.

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Seminar Pierre Alquier @Bocconi - April 22
by Giacomo Zanella 21 Apr '21

21 Apr '21

A reminder of the following BIDSA webinar (link <https://www.bidsa.unibocconi.eu/wps/wcm/connect/site/bidsa/home/news_events…> ): Date: Thursday, April 22, h14:00 (Italy time) Speaker: Pierre Alquier (RIKEN) Title: Robust Estimation via M.M.D. Minimization Abstract: In this talk, I will study the properties of parametric estimators based on the Maximum Mean Discrepancy (MMD) defined by Briol et al. (2019). In a first time, I will show that these estimators are universal in the i.i.d setting: even in case of misspecification, they converge to the best approximation of the distribution of the data in the model, without ANY assumption on this model. This leads to very strong robustness properties. In a second time,I will show that these results remain valid when the data is not independent, but satisfy instead a weak-dependence condition. This condition is based on a new dependence coefficient, which is itself defined thanks to the MMD. I will show through examples that this new notion of dependence is actually quite general. Reference: This talk is based on the following papers and softwares, with Badr-Eddine Chérief Abdellatif (Oxford University), Mathieu Gerber(University of Bristol), Jean-David Fermanian (ENSAE Paris) and Alexis Derumigny (University of Twente): http://arxiv.org/abs/1912.05737 http://proceedings.mlr.press/v118/cherief-abdellatif20a.html http://arxiv.org/abs/2006.00840 https://arxiv.org/abs/2010.00408 https://cran.r-project.org/web/packages/MMDCopula/ The webinar will be on zoom at: https://zoom.us/j/95795747882 Meeting ID: 957 9574 7882 Passcode: 025765 Kind regards, Giacomo Zanella

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(Reminder) Seminar Thursday 22 - Optimal constrained and unconstrained subgraph structures (prof. Clara Stegehuis)
by Gianmarco Bet 21 Apr '21

21 Apr '21

Dear colleagues, This is a reminder that tomorrow (Thursday 22) at 14:30, prof. Clara Stegehuis (Twente University) will give a virtual seminar “in Florence”, to which you are all invited. You can find title and abstract below this message. The seminar will be on Zoom. You can find the information to join below. If you know of someone who might be interested and is not subscribed to the random mailing list, please do not hesitate to forward this announcement to them. Kind regards, Gianmarco Topic: Clara Stegehuis - Optimal constrained and unconstrained subgraph structures Time: Apr 22, 2021 02:30 PM Rome Join Zoom Meeting https://us02web.zoom.us/j/85651690146?pwd=ZnRCbGR6OUlxM2J4RldJd2R1aVE3Zz09 <https://us02web.zoom.us/j/85651690146?pwd=ZnRCbGR6OUlxM2J4RldJd2R1aVE3Zz09> Meeting ID: 856 5169 0146 Passcode: 770134 Title: Optimal constrained and unconstrained subgraph structures Abstract: Subgraphs contain important information about network structures and their functions. We investigate the presence of subgraphs in a random graph model with infinite-variance degrees. We introduce an optimization problem which identifies the dominant structure of any given subgraph. The unique optimizer describes the degrees of the vertices that together span the most likely subgraph and allows us to count and characterize the asymptotic number of subgraphs in a simple manner. We then show that this optimization problem easily extends to investigating other random network structures, such as clustering, which expresses the probability that two neighbors of a vertex are connected. The optimization problem is able to find the behavior of network subgraphs in a wide class of random graph models. ---------------------------------------------------------------------- Gianmarco Bet (he/him) Junior researcher https://gianmarco.bet Phone: (+39) 055 2751491 Department of Mathematics and Informatics "U. Dini" University of Florence Viale Morgagni, 65 50134 Firenze, Italy Office 64 ----------------------------------------------------------------------

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Online seminar Svaluto-Ferro
by matteo.burzoni＠unimi.it 20 Apr '21

20 Apr '21

Dear colleagues, it is our pleasure to invite you to the following online seminar: Zoom link (see also details below): <https://us02web.zoom.us/j/88398874167?pwd=YkRzdlNYWjVjUlc3T294ZjZuVHNSdz09> https://us02web.zoom.us/j/88398874167?pwd=YkRzdlNYWjVjUlc3T294ZjZuVHNSdz09 Speaker: <https://homepage.univie.ac.at/sara.svaluto-ferro/> Sara Svaluto-Ferro (University of Vienna) Title: From signature-based models to affine and polynomial processes and back. Time: Tuesday, April 27, 4PM (Italian time) Abstract: Modern universal classes of dynamic processes, based on neural networks or signature methods, have recently entered the field of stochastic modeling, in particular in Mathematical Finance. This has opened the door to more data-driven and thus more robust model selection mechanisms, while principles like no arbitrage still apply. We analyze here different types of signature models. In the first part, we focus on models based on the signature of a supporting process, which can range from a Brownian motion, to a multidimensional Levy-process, to a general multidimensional tractable stochastic process, to the times series corresponding to some liquid objects on the market. We also present methods how to fit these models to data. In the second part we focus on signature SDEs, i.e. (possibly Lévy driven) SDEs whose characteristics are linear functions of the process signature. We show how these new models can be embedded in the framework of affine and polynomial processes, which have been - due to their tractability - the dominating process class prior to the new era of highly overparametrized dynamic models. We show that generic classes of diffusion models can be described in terms of a signature SDEs. This allows to get power series expansions for expected values of analytic functions of the process' marginals. The talk is based on joint works with Christa Cuchiero, Guido Gazzani, Francesca Primavera and Josef Teichmann. Zoom meeting details: meeting ID: 883 9887 4167 Passcode: mVJ6SR Best, Matteo Burzoni

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New deadline for BISP12 - Twelfth Workshop on Bayesian Inference in Stochastic Processes
by elisa varini 20 Apr '21

20 Apr '21

Having received some late submission requests, we decided to reopen the call for contributed papers until 25 April 2021. It is possible to submit abstracts (using the templates in the website) at https://bisp12.imati.cnr.it/ In the meantime, we have completed the list of invited speakers (all junior ones) and we are going to contact senior researchers who will serve as discussants. The speakers will be: • Atilla Ay (George Washington University, USA) • Clara Grazian (University of New South Wales, Australia) • Andrew Holbrook (University of California, Los Angeles, USA) • Kaoru Irie (University of Tokyo, Japan) • Roi Naveiro (CSIC-ICMAT, Spain) • Giovanni Rebaudo (University of Texas at Austin, USA) • Claudia Solis-Lemus (University of Wisconsin-Madison, USA) • Stéphanie Van Der Pas (Amsterdam UMC, The Netherlands) • Andi Wang (University of Bristol, UK) • Paul Wu (Queensland University of Technology, Australia) The titles of their contributions are available on the website. It is also possible to register (free of charge) on the same website to attend the workshop on 27-28 May (afternoons, Central European Summer Time). Elisa Varini and Fabrizio Ruggeri Chairs, Organising and Scientific Committees

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Richiesta di comunicazione ai membri della lista RANDOM
by Enrico Moretto 20 Apr '21

20 Apr '21

con preghiera di diffusione alla lista RANDOM. Ringrazio. Cordiali saluti, enrico moretto *** Si informano i colleghi interessati che il workshop "/Network models for financial contagion and systemic risk/", organizzato dal Dipartimento di Economia e Management dell'Università di Pavia si terrà online il prossimo 28 maggio 2021. I contributi selezionati saranno considerati per la special issue "Network models for financial contagion and systemic risk" della rivista Frontiers in AI (https://www.frontiersin.org/research-topics/17785/network-models-for-financ… <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.front…>). La scadenza della call for paper è fissata per il 14 maggio. Maggiori informazioni nella locandina allegata.

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Sussex probability seminar
by Enrico Scalas 19 Apr '21

19 Apr '21

Care colleghe e colleghi, vi invio l'annuncio del seminario di Vladislav Vysotskiy il 26 aprile a mezzogiorno. Le persone interessate possono ottenere il link contattando l'organizzatrice, Dr Minmin Wang (minmin.wang(a)sussex.ac.uk) Cordiali saluti, Enrico Scalas -- Next Monday (26th April) at 11am (UK time) there’ll be an online probability seminar given by Vladislav Vysotskiy. Title: How long is the convex minorant of a one-dimensional random walk? Abstract: We prove distributional limit theorems for the length of the largest convex minorant of a one dimensional random walk with independent identically distributed increments. Depending on the distribution of the increments there are several regimes with different limit distributions for the length. The most prominent of our results is a central limit theorem for the length in the case when the increments have zero mean and finite variance. Among other tools, we employ a representation of convex minorants of random walks in terms of uniform random permutations. This talk is based on a joint work with Gerold Alsmeyer, Zakhar Kabluchko, and Alexander Marynych.

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Corso SIMULATION AND INFERENCE IN POPULATION GENETICS
by Matteo Ruggiero 19 Apr '21

19 Apr '21

Cari colleghi, nell’ambito del programma di Visiting Professors della Laurea Magistrale in Stochastics and Data Science dell’Università di Torino (programma completo alla pagina https://www.master-sds.unito.it/go/visiting) con piacere annunciamo il seguente corso: -------------------------------------- Paul JENKINS (University of Warwick, UK) SIMULATION AND INFERENCE IN POPULATION GENETICS Population genetics provides a rich source of data. We now have the ability to sequence, cost-efficiently, the genomes of a large number of individuals from a species. Patterns of variation in DNA sequences offer a rich insight into biological and demographic processes: mutation, natural selection, past migration events, admixture, population structure, and so on. But such data are high-dimensional, noisy, and - because of shared ancestry - not independent, giving rise to some challenging statistical problems. In this course we will cover two important models for the analysis of genetic data - the coalescent, and the Wright-Fisher diffusion. We will discuss methods of simulation of data from these models, as well as how to perform inference for key biological and evolutionary parameters, using techniques such as MCMC. -------------------------------------- Il corso si svolgerà online secondo il seguente calendario - mar 27 Aprile, h.14-16 - mer 28 Aprile, h.16-18 - mar 4 Maggio, h.14-16 - mer 5 Maggio, h.16-18 - mer 12 Maggio, h.16-18 - mar 18 Maggio, h.14-16 - mer 19 Maggio, h.16-18 Il corso è rivolto agli studenti della Laurea Magistrale ma la partecipazione è aperta a tutti gli interessati, tramite le seguenti riunioni Webex valide rispettivamente per le lezioni del martedì e del mercoledì: https://unito.webex.com/unito/j.php?MTID=meeb9bd7865e8bc86b75074b346c0a3ed Ricorre ogni Martedì con validità 13/4/2021 fino a 18/5/2021 da 14:00 a 16:00 Numero riunione: 121 415 2525 Password: MEiAMZMf986 https://unito.webex.com/unito/j.php?MTID=m775c416c6142fd5b86bd7207f46dbabe Ricorre ogni Mercoledì con validità 14/4/2021 fino a 19/5/2021 da 16:00 a 18:00 Numero riunione: 121 469 7803 Password: C5RsPRapS92 Cordiali saluti, Matteo Ruggiero --- Matteo Ruggiero University of Torino and Collegio Carlo Alberto www.matteoruggiero.it

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Course ISI-ERS "An Introduction to Functional Data Analysis for Density Functions in Bayes spaces"
by Alessandra Menafoglio 19 Apr '21

19 Apr '21

We cordially invite you to the short course "An Introduction to Functional Data Analysis for Density Functions in Bayes spaces”, which will be held on 29-30 April 2021, both days from 14:00 alle 17:00 (GMT+2). The course is part of the initiatives of the International Statistical Institute (ISI-ERS). It aims to provide participants with an overview on the models and methods today available for the analysis of distributional data (e.g., probability densities) by using the geometry of Bayes spaces. Further information on the course is available at: https://iasc-isi.org/events/iasc-ers-course-an-introduction-to-functional-d… <https://iasc-isi.org/events/iasc-ers-course-an-introduction-to-functional-d…> Participation to the webinars is free of charge, but registration is requested using the link below: https://register.gotowebinar.com/register/8667082239416059148 <https://register.gotowebinar.com/register/8667082239416059148> Best regards, Alessandra Menafoglio Karel Hron Jitka Machalova **Abstract** The analysis of distributional data (probability density functions or histogram data) has recently gained increasing attention in the applications. Distributional data are often observed by themselves, or as result of aggregation of large streams of data. The course will provide an introduction to the analysis of these data using a Functional Data Analysis (FDA) approach, grounded on the perspective of Bayes spaces. These spaces are mathematical spaces whose points are densities (or, more generally, measures), which generalize to the FDA setting the Aitchison simplex for multivariate compositional data. The course will give an overview of the theory of Bayes spaces, as well as of statistical methods developed in this setting. All the methods will be illustrated through examples from real case studies. — Alessandra Menafoglio MOX - Dept. of Mathematics Politecnico di Milano Piazza Leonardo da Vinci, 32, 20133 Milan - Italy Phone: +39 02 2399 4642 Email: alessandra.menafoglio(a)polimi.it

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online seminar - Giuseppe Savaré - April 22
by Carbone Raffaella 18 Apr '21

18 Apr '21

Dear colleagues, it is our pleasure to invite you to the following online seminar Speaker: *Giuseppe Savaré* (Università Bocconi - Milano) Title: Hellinger/Wasserstein contraction and regularization properties of diffusion semigroups. Time: Thursday, *April 22, *4PM (Italian time) Zoom Link <https://us02web.zoom.us/j/89543157111?pwd=NnAyblhVNkppeERRRFd1VGYwTkMyUT09> (ID and passcode below if necessary) The seminar is a satellite activity of the PhD course "Introduction to coercive inequalities with applications in analysis and probability theory" (professor Boguslaw Zegarlinski - Imperial College, London) Abstract We illustrate a duality approach to contraction and regularizing properties of diffusion semigroups satisfying a suitable Bakry-Emery condition that emphasize an interplay between Hellinger-Kakutani, Kantorovich-Wasserstein, and Hellinger-Kantorvich distances. In the case of the Kantorovich-Wasserstein distance, contraction properties are also related to the gradient flow structure of the evolution driven by the logarithmic entropy and provide a nice geometrical interpretation of Log-Sobolev and Talagrand inequalities. Best regards, Raffaella Carbone ---------- Join Zoom Meeting https://us02web.zoom.us/j/89543157111?pwd=NnAyblhVNkppeERRRFd1VGYwTkMyUT09 Meeting ID: 895 4315 7111 Passcode: 029655 + -- Raffaella Carbone, PhD Probabilità e Statistica Matematica Dipartimento di Matematica dell'Università degli Studi di Pavia

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Post-doc position at Scuola Normale Superiore
by Mario Maurelli 18 Apr '21

18 Apr '21

Dear colleagues, A call for application for a post-doc position with name "Stochastic models of interest for fluid mechanics", as part of the research project "Stochastic Analysis tools for Extreme Event Probabilities in Climate Change", underProf. Franco Flandoli's guidance, is open at the Scuola Normale Superiore in Pisa. The position starts before the end of 2021 and lasts one year. The deadline for application is May 3, 2021. More information is available here: https://amministrazionetrasparente.sns.it/scuola/opportunit%C3%A0-offerte-d… Best regards Mario Maurelli

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