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Seminar in Statistics BAS KLEIJN
by Pierpaolo De Blasi 08 Oct '21

08 Oct '21

SEMINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.carloalberto.org/events/category/seminars/seminars-in-statistic…> Venerdi 15 Ottobre 2021, alle ore 12.00, presso il Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terrà il seguente seminario: ------------------------------------------------ Speaker: *Bas Kleijn *(University of Amsterdam) Title: *Confidence sets in a sparse stochastic block model with two * *communities of unknown sizes* Abstract: In a sparse stochastic block model with two communities of unequal sizes we derive two posterior concentration inequalities, that imply (1) posterior (almost-)exact recovery of the community structure under sparsity bounds comparable to well-known sharp bounds in the planted bi-section model; (2) a construction of confidence sets for the community assignment from credible sets, with finite graph sizes. The latter enables exact frequentist uncertain quantification with Bayesian credible sets at non-asymptotic graph sizes, where posteriors can be simulated well. There turns out to be no proportionality between credible and confidence levels: for given edge probabilities and a desired confidence level, there exists a critical graph size where the required credible level drops sharply from close to one to close to zero. At such graph sizes the frequentist decides to include not most of the posterior support for the construction of his confidence set, but only a small subset of community assignments containing the highest amounts of posterior probability (like the maximum-a-posteriori estimator). It is argued that for the proposed construction of confidence sets, a form of early stopping applies to MCMC sampling of the posterior, which would enable the computation of confidence sets at larger graph sizes. Paper available at: https://arxiv.org/abs/2108.07078 ------------------------------------------------ In ottemperanza alle norme anti Covid, per partecipare in presenza è necessario prenotarsi tramite il seguente form online: https://forms.gle/ZpaUtXCEPeei98yE8 Sarà possibile seguire il seminario anche in streaming: Join Zoom Meeting <https://us02web.zoom.us/j/85083283178?pwd=WUV4ZlUxc1c4NDJqbkpYNWw1eENSdz09> Meeting ID: 850 8328 3178 Passcode: 046282 Il seminario 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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Fwd: Premio Cuozzo
by Lucia Caramellino 08 Oct '21

08 Oct '21

Buongiorno. Inoltro volentieri l’avviso del bando del premio Cuozzo 2021 (premio di dottorato in Matematica, bandito annualmente dal dipartimento di Matematica a Tor Vergata). Cari saluti, Lucia +++++++++++++++++++++++++++++++++ Lucia Caramellino Dipartimento di Matematica Università di Roma “Tor Vergata” Web: http://www.mat.uniroma2.it/~caramell <http://www.mat.uniroma2.it/~caramell> > Inizio messaggio inoltrato: > > Da: Filippo Bracci <fbracci(a)mat.uniroma2.it> > Oggetto: Premio Cuozzo > Data: 7 ottobre 2021 15:38:48 CEST > A: Filippo Bracci <fbracci(a)mat.uniroma2.it> > > Carissimi, > > vi informo che è uscito il bando del premio Cuozzo: > > https://www.mat.uniroma2.it/Docs_avvisi/Bando-cuozzo-2021 <https://www.mat.uniroma2.it/Docs_avvisi/Bando-cuozzo-2021> > > Il premio, di Euro 3000, giunto alla XIV edizione, è dedicato alla memoria di Michele Cuozzo: http://www.mat.uniroma2.it/~dott/cuozzo.html <http://www.mat.uniroma2.it/~dott/cuozzo.html> . > > Possono far domanda tutti coloro che hanno conseguito il titolo di Dottore di Ricerca in Matematica presso una Università o Istituzione Italiana nei 12 mesi precedenti alla scadenza del bando. La scadenza del bando è il 5 Novembre p.v. ore 12:00. > > Vi prego di dare diffusione della notizia tra gli interessati, > > grazie > > cari saluti > > Filippo Bracci > -- > ************************ > Prof. Filippo Bracci > Direttore > Dipartimento di Matematica > Universita' di Roma "Tor Vergata" > Via della Ricerca Scientifica 1 > 00133 Roma - ITALIA > Tel: (+39-)06-7259 4643/4105 > Fax: (+39-)06-7259 4699 > E-mail: fbracci(a)mat.uniroma2.it <mailto:fbracci@mat.uniroma2.it> > Web-page: www.mat.uniroma2.it/~fbracci <http://www.mat.uniroma2.it/~fbracci>

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Mini-course about Rough Volatility by Jim Gatheral CUNY
by Giacomo Bormetti 08 Oct '21

08 Oct '21

Dear all, in collaboration with Jim Gatheral from City University of New York we organize a mini-course about Rough Volatility. The course will take place only in presence in Bologna at the Department of Mathematics (Piazza di Porta San Donato 5). Below all the details. All interested people are kindly invited. Sincerely Giacomo Bormetti and Fabrizio Lillo Gio 14 Ottobre, 4:00-7:00 PM CET Aula Tonelli Jim Gatheral, Baruch College CUNY, New York Titolo: Rough volatility I Rough volatility connects the microstructure of financial markets with the large-scale behavior of volatility. This approach results in parsimonious models that are consistent across different time-scales and show remarkable agreement with econometric data. In this first lecture of two, we will focus on the econometric motivation of rough volatility and explore its consequences for pricing, focusing on the rough Bergomi model. As an application, we will show how to forecast realized variance and the forward variance curve. Gio 21 Ottobre, 4:00-7:00 PM CET Aula Tonelli Jim Gatheral, Baruch College CUNY, New York Titolo: Rough volatility II In this second lecture, we will present the microstructural foundation for rough volatility models. This leads to the class of affine forward variance (AFV models) and more recently to so-called super Heston models, a special case of which is the quadratic rough Heston model. We give a brief overview of recent developments, including numerical solution techniques. Numerical experiments are performed to give intuition for the effect of changing model parameters. Both lectures will be in the form of Jupyter notebooks that will be made available afterwards, including code to reproduce most of the computations.

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Call for 3 postdoctoral positions in MERC at the School for Advanced Studies of Naples
by Tiziano De Angelis 07 Oct '21

07 Oct '21

Dear All, There are 3 postdoctoral positions available in the MERC programme (Modelling and Engineering Risk and Complexity) at the School for Advanced Studies in Naples (Scuola Superiore Meridionale). The School is highly multidisciplinary and these posts could be of interest for candidates with a background in applied probability and stochastics (both theoretical and applied). Here is the link to the job advert http://www.ssm.unina.it/en/postdoctoral-fellowships-call-for-application-no… The deadline for applications is set for 1st December 2021. Please feel free to distribute the advert to your network. I would be happy to receive enquiries from potential candidates from the applied probability/stochastics area. Best wishes Tiziano

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Hooke Research Fellowships at the University of Oxford
by Marco Alessandro Fuhrman 07 Oct '21

07 Oct '21

A tutti gli interessati. Desidero comunicare questo avviso per posizioni presso l'Università di Oxford. Cordiali saluti a tutti. Marco Fuhrman ------------------- Hooke Research Fellowships Mathematical Institute, University of Oxford(https://www.maths.ox.ac.uk/ ) (https://www.maths.ox.ac.uk/node/39999 ) https://www.maths.ox.ac.uk/node/39999 Deadline: November 3, 2021 The Oxford Mathematical & Computational Finance Group(https://www.maths.ox.ac.uk/groups/mathematical-finance ) invite applications from talented researchers with interests in Stochastic analysis, Mathematical Finance or Data Science for a Hooke Research Fellowship(https://www.maths.ox.ac.uk/node/33994 ) starting September 2022. These prestigious Fellowships at the University of Oxford are full-time, fixed term up to 36 months starting September 2022 and provide an ideal opportunity for candidates to pursue an independent research programme. Successful applicants will be free to conduct their own research programme. To aid the development of their academic profile, Fellows will be required to contribute up to three hours of departmental teaching per week for the 24 weeks of each academic year, averaged over the period of the Fellowship to allow for extended visits elsewhere. Candidates will have, or be close to completing, a PhD in mathematics or a related discipline. They must show evidence of independence and the ability to undertake research of the highest academic standard, hold an outstanding record of papers published in major international journals (commensurate with career stage), and have a relevant research plan which would enhance the Mathematical Institute’s research profile. Additional information about the post, and a full list of selection criteria, are available here: https://www.maths.ox.ac.uk/node/39999 Please direct informal enquiries to the Recruitment Administrator (email: vacancies(a)maths.ox.ac.uk), quoting vacancy reference 153585. Applicants should read the job description before writing their application. You will be required to upload a supporting letter setting out how you meet the selection criteria, a curriculum vitae including full list of publications with top three papers starred, a statement of research interests including a plan for research during the Fellowship, and the names and contact details of two referees as part of your online application. NOTE: Applicants are responsible for contacting their referees and making sure that their letters are received by the closing date. Applications for this vacancy are to be made online. To apply for this post and for further details, including a job description and selection criteria, please click on the link below: https://my.corehr.com/pls/uoxrecruit/erq_jobspec_details_form.jobspec?p_id=… Only applications received before 12:00 noon UK time on 3 November 2021 can be considered. Committed to equality and valuing diversity. Vacancy Reference: 153585 Appointment Term: 3 years Closing Date: Friday, November 3, 2021 - 12:00 UK time

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Seminar by Francesca Biagini in Verona (Virtual)
by Alessandro Gnoatto 07 Oct '21

07 Oct '21

Prof. Francesca Biagini (LMU Munich) will give a virtual talk at our Department seminar. Date: 13 October 12:00 CEST. Title: "Reduced-form setting under model uncertainty with non-linear affine intensities" If you would like to attend via Zoom, please register at the following link, we will send you the details: https://docs.google.com/forms/d/e/1FAIpQLSe6_5W5PbKr9R3fufAahV1D4js4-6AAcEn… Abstract: 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. accepted on Probability, Uncertainty and Quantitative Risk, 2021. [3] Tolulope Fadina, Ariel Neufeld, and Thorsten Schmidt. Affine processes under parameter uncertainty. Probability, Uncertainty and Quantitative Risk [link.springer.com] volume 4 (5), 2019. -- Prof Alessandro Gnoatto, PhD Dipartimento di Scienze Economiche Università degli Studi di Verona Via Cantarane 24 37129, Verona, Italy Room 1.05 Tel: +39 045 802 8537 Homepage: www.alessandrognoatto.com E-mail: alessandro.gnoatto(a)univr.it -------------------------------------------------- View my research on my SSRN Author page: http://ssrn.com/author=1615989 --------------------------------------------------

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[MLfF] Call for contributions : MACHINE LEARNING FOR FINANCE, 3rd One-Day International Remote Workshop
by Marco Corazza 07 Oct '21

07 Oct '21

*3rd One-Day International Remote Workshop on* *MACHINE LEARNING FOR FINANCE* It is open the *call for contributions* for the *3rd One-Day International Remote Workshop on MACHINE LEARNING FOR FINANCE* *Workshop* - Date: December 17th, 2021 - Mode: Streaming via the Zoom platform offered by the Department of Economics of the Ca’ Foscari University of Venice - Attendance free of charge *Topics* Artificial Intelligence, Machine Learning and Soft Computing for Finance, Insurance and Actuarial Disciplines *Submission* - Proposal: Title, author(s) and abstract of about 200 words - Deadline: December 10th, 2021 - Send to: corazza(a)unive.it *Publications* Facultative submission of papers to the international journal *Mathematical Methods in Economics and Finance* (https://unive.it/m2ef), included in the MathSciNet list of journals and in the Italian National Agency for the Evaluation of Universities and Research Institutes one *Past editions* - One-Day International Remote Workshop on MACHINE LEARNING FOR FINANCE - October 3rd, 2019: https://www.unive.it/data/agenda/3/32112 - 2nd One-Day International Remote Workshop on MACHINE LEARNING FOR FINANCE - December 18th, 2020: https://www.unive.it/data/agenda/3/45054 Best regards, Marco Corazza P.S. - We apologize for possible multiple copies of this email. -- Marco Corazza, Ph.D. Department of Economics - Ca' Foscari University of Venice San Giobbe, Cannaregio 873 - 30121 Venezia, Italy Mobile: (+39) 366 602-9134 Phone: (+39) 041 234-6921 Fax: (+39) 041 234-7444 E-mail: corazza(a)unive.it Editor-in-Chief: Mathematical Methods in Economics and Finance - www.unive.it/m2ef

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(PMS)^2 online talk: Carlo Bellingeri, Monday October 11 at 17.30
by Carlo Orrieri 07 Oct '21

07 Oct '21

Dear colleagues, We are happy to announce the following online talk: Speaker: Carlo Bellingeri (TU Berlin) Title: Signatures and non commutative probability. Abstract: Given a smooth path X, the signature of a path is the infinite sequence of the iterated integral of X with itself. If X is a stochastic process with an integration structure (e.g. semimartingale), the corresponding signature is the key-object to understand the "lack of continuity" between the solution of a SDE driven by X and the process itself. In this talk, we will review the main properties of the signature and introduce the new notion of "non-commutative signature", which we tailored to study a new class of rough/stochastic differential equations arising in the context of non-commutative probability. Joint paper with Nicolas Gilliers (Université de Toulouse) and Yannick Vargas (Postdam Universität) Date and time: Monday October 11, 17:30-18:30 (Rome time zone) Zoom link: https://us02web.zoom.us/j/5772228296 <https://us02web.zoom.us/j/5772228296> 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)

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Postdoc position at the Scuola Normale Superiore on the project "Mean Field Games aspects of training residual networks”.
by Giulia Livieri 06 Oct '21

06 Oct '21

Dear all, A call for a 12 month research contract is open at the Scuola Normale Superiore, Pisa (Italy). The topic of the research is *“**Mean Field Games aspects of training deep neural networks and the use of deep neural networks for solving Mean Field Games”* and it is part of the project *“**Mean Field Games aspects of training residual networks”**.* In particular, the research will be focused on the study of the training of deep neural network via the Mean Field Games approach and/or on the use of deep neural network to solve Mean Fields Games problems. A special emphasis will be put on the mathematical aspects of the two approaches. The research will be developed under the direction of the scientific director Dr. Giulia Livieri. Duration of the contract: 1 year (estimated starting: November 2021) Annual gross remuneration, inclusive of all taxes: € 29,000 The details of the call (in Italian and English) are available at https://amministrazionetrasparente.sns.it/sites/default/files/bandi/assegni… The deadline is November 5, 2021. In case you need more information, please contact Giulia Livieri (giulia.livieri(a)sns.it) Thanks and all the best, Giulia Livieri

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Urgente: Bando RTD-A - MAT/06 - Università di Milano
by Daniela Morale 05 Oct '21

05 Oct '21

Cari colleghi, vi segnaliamo che è appena uscito il bando per un posto di ricercatore a tempo determinato di tipo A nel settore MAT/06, per lo svolgimento di attività di ricerca vincolata su tematiche green e innovazione - DM 10 agosto 2021 n. 1062 presso il Dipartimento di Matematica Federigo Enriques, Università degli Studi di Milano *Scadenza della domanda: *19 Ottobre 2021, ore 12:00 Tutte le informazioni sono reperibili alla seguente pagina: Ricercatore Tipo A – DM 1062-21 - s.c.01/A3, ssd MAT/06 (Codice 4872) <https://www.unimi.it/it/ateneo/lavora-con-noi/reclutamento-ricercatori/sele…> Vi preghiamo di dare ampia diffusione tra i vostri collaboratori interessati, considerata la scadenza a breve. Grazie Cordiali saluti Daniela Morale e Stefania Ugolini ___________________________________________________________ Daniela Morale Dept. Mathematics University of Milano Via C. Saldini, 50 20133 MILANO, Italy phone: +39 02 5031 6081 fax: +39 0250316090 email: Daniela.Morale(a)unimi.it URL: http://www.mat.unimi.it/users/morale/ ________________________________________________________ * "*Even if you are a minority of one, the truth is the truth *"Gandhi* "Everything should be made as simple as possible, but not simpler." *A. Einstein*

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PhD position at Aarhus university
by Alessandra Cipriani 05 Oct '21

05 Oct '21

Ricevo ed inoltro. Alessandra Cipriani ============== 3-year PhD position at Aarhus University ============== The Department of Mathematics at Aarhus University invites applications for a 3-year PhD position in spatial random networks and topological data analysis starting in February 2022. The closing date of the vacancy is November 1, 2021. More details can be found in the official vacancy text: https://phd.nat.au.dk/for-applicants/open-calls/november-2021/spatial-rando…<https://urldefense.proofpoint.com/v2/url?u=https-3A__phd.nat.au.dk_for-2Dap…> For further inquiries about the position please contact Assoc. Prof. Christian Hirsch: c.p.hirsch(a)rug.nl<mailto:c.p.hirsch@rug.nl> Best regards, Christian Hirsch

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Postdoc position at the Scuola Normale Superiore
by Fabrizio Lillo 04 Oct '21

04 Oct '21

Dear all, A call for a 15 month research contract is open at the Scuola Normale Superiore, Pisa (Italy). The topic of the research is “Algorithmic trading in energy markets with market microstructure methods” and it is part of a collaboration between A2A and Scuola Normale. The project will concern the development of quantitative methods for the analysis and modeling of the high frequency dynamics of price and of limit order book in energy markets. Specifically, the research will focus on: time series analysis and modeling in energy markets, short-term scenario generation of market evolution and development of market making and optimal execution strategies. The research activity will be done in close collaboration with the A2A quantitative team in Milan. The details of the call (in Italian and English) are available at https://amministrazionetrasparente.sns.it/bando/algorithmic-trading-nei-mer… The deadline is October 21. I would be grateful if you could forward this message to any potentially interested candidate. In case you need more information, please contact Fabrizio Lillo (fabrizio.lillo(a)sns.it) Thanks and all the best, 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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Bando RTD-B MAT/06, Università di Siena
by Lucia Caramellino 04 Oct '21

04 Oct '21

Cari tutti, informo che è uscito in Gazzetta Ufficiale un bando per RTD-B SC 01/A3 Analisi matematica, SSD MAT/06 Probabilità e Statistica matematica, presso il Dipartimento Ingegneria dell’Informazione e Scienze Matematiche dell'Università di Siena. Tutte le informazioni sono reperibili all'indirizzo https://www.unisi.it/albo_pretorio/bandi/concorsi_interni/ricercatore-tempo… <https://www.unisi.it/albo_pretorio/bandi/concorsi_interni/ricercatore-tempo…> (scadenza: 2 novembre 2021). Buona giornata, Lucia +++++++++++++++++++++++++++++++++ Lucia Caramellino Dipartimento di Matematica Università di Roma “Tor Vergata” Web: http://www.mat.uniroma2.it/~caramell <http://www.mat.uniroma2.it/~caramell>

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RTD B Università Roma Tre
by Julia Mortera 30 Sep '21

30 Sep '21

Cari tutti, con la presente vorrei annunciare l'emissione di un bando all’Università Roma Tre, Dipartimento di Economia per un Ricercatore a tempo determinato B - SECS-S/01 (Statistica) (2 Piano Straordinario MUR 2020). Il termine di scadenza delle domande di partecipazione è il 28/10/2021. Il bandointegraleèdisponibileal seguente indirizzo: http://www.albopretorionline.it/uniroma/alboente.aspx <http://www.albopretorionline.it/uniroma/alboente.aspx> e si trova al link: https://www.albopretorionline.it/uniroma/download.aspx?ida=614591&pubb=1&n=1 <https://www.albopretorionline.it/uniroma/download.aspx?ida=614591&pubb=1&n=1> con allegati al: https://www.albopretorionline.it/uniroma/download.aspx?ida=614591&pubb=1&n=4 <https://www.albopretorionline.it/uniroma/download.aspx?ida=614591&pubb=1&n=4> Julia Mortera -- Julia Mortera, Professor of Statistics, Università Roma Tre Web page: https://juliamortera.wordpress.com/ http://tinyurl.com/ztj6ked

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special issue - Information Sciences
by Roy Cerqueti 30 Sep '21

30 Sep '21

Dear all, this is to point to your attention the call for papers for a special issue in Information Sciences on themes related to data science and finance. More detail can be found here: https://www.journals.elsevier.com/information-sciences/call-for-papers/big-… Thank you for your attention. Best regards, Roy Cerqueti -- ________________________________________________________ Le informazioni contenute in questo messaggio di posta elettronica sono strettamente riservate e indirizzate esclusivamente al destinatario. Si prega di non leggere, fare copia, inoltrare a terzi o conservare tale messaggio se non si è il legittimo destinatario dello stesso. Qualora tale messaggio sia stato ricevuto per errore, si prega di restituirlo al mittente e di cancellarlo permanentemente dal proprio computer. The information contained in this e mail message is strictly confidential and intended for the use of the addressee only. If you are not the intended recipient, please do not read, copy, forward or store it on your computer. If you have received the message in error, please forward it back to the sender and delete it permanently from your computer system. -- Fai crescere i nostri giovani ricercatori dona il 5 per mille alla Sapienza *codice fiscale 80209930587*

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Francesco Russo's talk at the Torino seminar series in Stochastics and Mathematical Statistics
by Tiziano De Angelis 29 Sep '21

29 Sep '21

Dear all, We are glad to announce the first seminar of the *Torino seminar series in Stochastics and Mathematical Statistics. * Torino seminar series SMS is a monthly seminar series held at the Department of Mathematics G. Peano of the University of Turin. For more info and a list of future talks see https://sites.google.com/view/torinostochastics. *Date and time:** Friday 1 October*, 2021, h 17:00-18:00 *Location*: Aula Magna, Palazzo Campana, via Carlo Alberto 10, Torino *Speaker*: *Francesco RUSSO *(ENSTA Paris, Institut Polytechnique de Paris) *Title*: Fokker-Planck equations with terminal condition and related McKean probabilistic representation *Abstract**:* Stochastic differential equations (SDEs) in the sense of McKean are stochastic differential equations, whose coefficients do not only depend on time and on the position of the solution process, but also on its marginal laws. Often they constitute probabilistic representation of conservative PDEs, called Fokker-Planck equations; In general Fokker-Planck PDEs are well-posed if the initial condition is specified. Here, alternatively, we consider the inverse problem which consists in prescribing the final data: in particular we give sufficient conditions for existence and uniqueness. We also provide a probabilistic representation of those PDEs in the form of a solution of a McKean type equation corresponding to the time-reversal dynamics of a diffusion process. The research is motivated by some application consisting in representing some semilinear PDEs (typically Hamilton-Jacobi-Bellman in stochastic control) fully backwardly. This work is based on a collaboration with L. Izydorczyk (ENSTA), N. Oudhane (EDF), G. Tessitore (Milano Bicocca) Best regards, The organizers (Tiziano De Angelis, Giuseppe D'Onofrio, Elena Issoglio)

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Large N limits of Wilson loops in gauge theories
by Enrico Scalas 27 Sep '21

27 Sep '21

Care colleghe e colleghi, Vi puo' forse interessare questo seminario che si terra' giovedi' prossimo. Cordiali saluti, Enrico Scalas -- Dear all, This Thursday we kick off our Mathematical Physics seminar series for the new academic year with a talk by Antoine Dahlqvist (Sussex) on Large N limits of Wilson loops in gauge theories Abstract: Gauge theories are a type of field theory introduced and studied from the 70’s by physicists as a theoretical model describing the fundamental interactions between elementary particles. It quickly appeared to be a place where geometry and physics met and influenced each others. In this talk, I shall discuss some questions closer to probability and random matrix theory, inspired by the so-called large N limit regime of Euclidean field theories. I will present some old and new theorems about the Yang-Mills measure for two dimensional space-time geometries. The seminars are fortnightly on Thursdays 12:00 - 13:00 in 5C11 and can also be followed on Zoom https://universityofsussex.zoom.us/j/98075042563?pwd=VTBxSHVMVUl2Y0piblp4Y0… Passcode: 938719 The seminars are open for everyone with an interest in topics on the intersection of Mathematics and Physics The schedule for the seminars this term can be found at https://www.maths.sussex.ac.uk/seminars/mathphys.html To receive further announcements for our seminar series, please sign up to the mailing list 'mathphy_seminar' following the guidance at https://support.microsoft.com/en-us/office/distribution-groups-e8ba58a8-fab… Best wishes, Antoine, Michael, Xavier and Folkert

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PhD positions in Bern
by Fabio Bellini 27 Sep '21

27 Sep '21

>From Prof. Johanna Ziegel: ========================================== UNIVERSITY OF BERN INSTITUTE OF MATHEMATICAL STATISTICS AND ACTUARIAL SCIENCE 2 PhD POSITIONS We invite applications for 2 PhD positions in several areas of research pursued by professors of the institute. 1) Probability theory (with emphasis on stochastic geometry, point processes, stable laws; supervised by Ilya Molchanov). 2) Mathematical statistics (with emphasis on empirical processes and nonparametric statistics; supervised by Lutz Dümbgen). 3) Statistical data science (with emphasis on forecasting and kernel-based methods; supervised by David Ginsbourger and/or Johanna Ziegel). The salary will be at the level foreseen by the Swiss National Foundation, see http://www.snf.ch/SiteCollectionDocuments/allg_doktorierende_d.pdf There is a possibility to complement the salary by taking up teaching and statistical consulting duties in the department. The starting date is February 2022 or as can be arranged by mutual agreement. The applications should be submitted in a single pdf file, which includes a cover letter (indicating one of the areas mentioned above as the preferred field of research), CV, transcripts from Bachelor and Master Studies, and e-mail addresses of two academic referees. Please, also send a copy of your master thesis as a separate file. If you have not completed your master thesis yet, please provide an outline of your thesis topic and the expected date of completion. The evaluation of applications starts on the 10th of October 2021. Later applications will be also considered, if the positions are not filled by that time. Applications should be e-mailed to the institute at <office(a)stat.unibe.ch> and addressed to the Director of the Institute, Prof. Johanna Ziegel. Further information is available from Profs. Lutz Dümbgen, David Ginsbourger, Ilya Molchanov and Johanna Ziegel.

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INCONTRO SULLA DIDATTICA DELLA PROBABILITA' E DELLA STATISTICA
by Paolo Dai Pra 27 Sep '21

27 Sep '21

Il Gruppo UMI (Unione Matematica Italiana) PRobability In Statistics, Mathematics and Applications (PRISMA) è lieto di annunciare un incontro online sulla Didattica della Probabilità e della Statistica nei corsi di laurea degli Atenei Italiani Grazie al contributo di numerosi esperti, verranno discussi contenuti e modalità didattiche in molti ambiti, evidenziando per ciascuno le esigenze specifiche. A questo messaggio allego la locandina con il programma provvisiorio. Per aggiornamenti si rimanda alla pagina https://sites.google.com/view/prisma-didattica-probstat/, da cui si accede ad un breve modulo di iscrizione. L’indirizzo per la partecipazione all’incontro verrà poi inviato per posta elettronica a tutti gli iscritti. Paolo Dai Pra Paolo Dai Pra Dipartimento di Informatica Università degli Studi di Verona Strada Le Grazie 15, 37134 Verona, Italy Tel. +390458027093 Paolo Dai Pra Dipartimento di Informatica Università degli Studi di Verona Strada Le Grazie 15, 37134 Verona, Italy Tel. +390458027093

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INCONTRO SULLA DIDATTICA DELLA PROBABILITA' E DELLA STATISTICA
by Paolo Dai Pra 26 Sep '21

26 Sep '21

Il Gruppo UMI (Unione Matematica Italiana) PRobability In Statistics, Mathematics and Applications (PRISMA) è lieto di annunciare un incontro online sulla Didattica della Probabilità e della Statistica nei corsi di laurea degli Atenei Italiani Grazie al contributo di numerosi esperti, verranno discussi contenuti e modalità didattiche in molti ambiti, evidenziando per ciascuno le esigenze specifiche. A questo messaggio allego la locandina con il programma provvisiorio. Per aggiornamenti si rimanda alla pagina https://sites.google.com/view/prisma-didattica-probstat/, da cui si accede ad un breve modulo di iscrizione. L’indirizzo per la partecipazione all’incontro verrà poi inviato per posta elettronica a tutti gli iscritti. Paolo Dai Pra Paolo Dai Pra Dipartimento di Informatica Università degli Studi di Verona Strada Le Grazie 15, 37134 Verona, Italy Tel. +390458027093

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[owps] OWPS, October 7th: P. Diaconis and L. Miclo on "THE random graph" (fwd)
by Michele Gianfelice 24 Sep '21

24 Sep '21

Salve, ricevo ed inoltro p.c.. Cordialmente, m.gianfelice ----------------------------------------------------------------------- Michele Gianfelice, PhD Dipartimento di Matematica e Informatica Università della Calabria Telephone : +39 0984 496412 Campus di Arcavacata Fax : +39 0984 496410 Ponte P. Bucci - cubo 30B email: gianfelice(a)mat.unical.it I-87036 Arcavacata di Rende (CS) www.mat.unical.it/~gianfelice/ ----------------------------------------------------------------------- ---------- Forwarded message ---------- Date: Thu, 23 Sep 2021 20:43:34 +0200 From: One World Probability <ow.probability(a)gmail.com> To: owps(a)lists.bath.ac.uk Subject: [owps] OWPS, October 7th: P. Diaconis and L. Miclo on "THE random graph" Dear probabilists, We are pleased to inform you that the OWPS will resume on October 7th, from 14:00 to 15:45 UTC. Persi Diaconis and Laurent Miclo will talk about THE random graph and random walk on it. Titles, abstracts and the Zoom link are below the signature, and can be found on the website https://www.owprobability.org/one-world-probability-seminar. We also inform you that, in accordance with the wishes expressed in the pooling, sessions will take place every other week (i.e. ~2 per month). Each session will consist of two talks of 45 minutes each. These two talks will be thematically unified. Please feel free to circulate this email. Probabilistically yours, Bastien Mallein and Sébastien Martineau -------- Persi Diaconis -- Probability theory for THE random graph Pick two Erdös-Renyi (n,1/2) graphs uniformly at random. What's the chance they are the same (isomorphic)? Small. How small? Well, at most n!/ 2^(n choose 2). When n= 100, that's less than 10^-1300. OK, now let n=infinity. The chance that the two graphs are isomorphic is one (!). This is THE random graph (the Rado graph R). I will review its many non-random models and many strange properties. ? It is a natural limit of the set of all finite graphs (a first order property is true for almost all finite graphs if and only if it holds with probability one in R) and this discontinuity is surprising. In joint work with with Sourav Chatterjee we tried to find finite manifestations: For finite n, the largest isomorphic induced subgraph of a pair has size 4log (n) -2loglog(n)-2log(4/e) +1 (within 1, all logs base 2 in probability when n is large). This matches data amazingly well (e.g. for n more than 30) and illuminates problems in constraint satisfaction. Laurent Mico -- A random walk on THE random graph R Let q(j) be a probability on N={0,1,2,...}. Let R be a model of THE random graph. A Markov chain on N starts at i and moves to one of its neighbor j in R with probability proportional to q(j). This Markov chain has a stationary distribution and we inquire about rates of convergence. Since each vertex is connected to half of the others and the diameter of R is 2, it seems likely that convergence is fast. In some models we show that log* (i) steps are necessary and sufficient for convergence. The proof uses a novel variant of Hardy's inequalities for trees. This is joint work with Sourav Chatterjee and Persi Diaconis. Zoom-link: https://us02web.zoom.us/j/81721277245?pwd=VjhadGFZcTVZamsvRkhZUExVbHAyZz09 Meeting ID 817 2127 7245 Passcode: 759491 If you are having trouble with zoom, or if the capacity of the zoom room gets exceeded, you can also access to the Youtube live stream at the channel of the seminar: https://www.youtube.com/channel/UCiLiEQGTp6bZEhuHDM-WNWQ

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Workshop "Deterministic and stochastic fractional diﬀerential equations and jump processes"
by Enrico Scalas 22 Sep '21

22 Sep '21

Care colleghe e cari colleghi, nell'ambito del programma "Fractional Differential Equations" ( https://www.newton.ac.uk/event/fde2/) che si terrà all'Isaac Newton Institute a Cambridge, organizzo una settimana di studi su "Deterministic and stochastic fractional diﬀerential equations and jump processes" (https://www.newton.ac.uk/event/fd2w01/) insieme a Jozsef Lorinczi e Vassili Kolokoltsov. L'evento avrà luogo tra il 21 febbraio e il 25 febbraio 2022 (ed è ora possibile registrarsi fino al 21 novembre 2021) e si terrà in modalità ibrida (online e con persone presenti, se possibile). La partecipazione online è gratuita. Per i dettagli potete consultare il sito seguente: https://www.newton.ac.uk/event/fd2w01/ Cordiali saluti, Enrico Scalas

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(PMS)^2 online talk: Hakima Bessaih, Monday September 27 at 17.30
by Margherita Zanella 22 Sep '21

22 Sep '21

Dear colleagues, we are happy to announce the following online talk: Speaker: Hakima Bessaih (Florida International University) Title: Numerical schemes for the 2d Stochastic Navier-Stokes equations. Abstract: We consider a time discretization scheme of Euler type for the 2d stochastic Navier-Stokes equations on the torus. We prove a mean square rate of convergence. This refines previous results established with a rate of convergence in probability only. Using exponential moment estimates of the solution of the Navier-Stokes equations and a convergence of a localized scheme, we can prove strong convergence of fully implicit and semi-implicit time Euler discretization and also a splitting scheme. The speed of convergence depends on the diffusion coefficient and the viscosity parameter. When the noise is additive, we are able to get strong convergence without localization. Date and time: Monday September 27, 17:30-18:30 (Rome time zone) Zoom link: https://us02web.zoom.us/j/5772228296 This is a talk 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. For more information see the dedicated webpage: https://paviamilanoseminars.wordpress.com/<http://paviamilanoseminars.wordpress.com/> 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)

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Seminars by Jim Gatheral, Baruch College CUNY New York
by Giacomo Bormetti 21 Sep '21

21 Sep '21

Dear all, Prof. Jim Gatheral is visiting the Department of Mathematics in Bologna for the next two months. On September 29 and October 13 he will deliver two seminars in presence in Bologna in Aula Cremona, main building of the Math Department. You are all kindly invited. It will be possible to follow the seminars online via Zoom too (please find below the links to connect). Sincerely, Giacomo Bormetti and Fabrizio Lillo 29-Sep-2021 16:00 (CET time) Aula Cremona, Department of Mathematics or Zoom https://unibo.zoom.us/j/99763851456?pwd=YzVBMTNxUXpRWngrNExaRWtMRjRkdz09 Title: Diamond trees and the forest expansion Abstract: I will present a “broken exponential martingale” G-expansion that generalizes and unifies our earlier exponentiation result (Alòs, Gatheral, and Radoičić) and the cumulant recursion formula of Lacoin, Rhodes, and Vargas. As one application, I show how to compute all terms in an expansion of the Lévy area. By reordering the trees in the G-expansion according to the number of leaves, our earlier exponentiation theorem can be recovered. As further applications, I will give model-free expressions for various quantities of interest under stochastic volatility. Finally, I will exhibit explicit computations of diamond trees under rough Heston. 13-Oct-2021 16:00 (CET time) Aula Cremona, Department of Mathematics or Zoom https://unibo.zoom.us/j/91206042957?pwd=d21ybkJQTEtkZHRWd25RLzJOQWV0QT09 Title: Pricing in affine forward variance models Abstract: The class of affine forward variance (AFV) models was defined in Gatheral and Keller-Ressel (2019); this class includes both the conventional Heston model and its celebrated extension, the rough Heston model of El Euch and Rosenbaum. The AFV characteristic function may be expressed in terms of the solution of a Volterra integral equation. I will present a rational approximation to the solution of this integral equation in the special case of the rough Heston model. Until now, simulation of AFV models using the Markovian approximation of Abi Jaber and El Euch has proved relatively complicated and time-consuming, I will present a new efficient and easy-to-implement method for simulating AFV models for general kernels. I will present numerical results using the rational approximation as a benchmark.

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

21 Sep '21

Dear all, On *September 30 at 17:00, Giulia Di Nunno* (University of Oslo) will give a virtual seminar “in Insubria & Bicocca”, to which you are all invited. You can find the title and abstract below. Title: Infinite dimensional Heston model and sensitivity analysis Abstract: We consider the infinite dimensional Heston stochastic volatility model for the price of a forward contract on a non-storable commodity. We give a representation formula for the forward price and then we consider options written on this. We analyse the sensitivity of the option price to the different parameters in the model with the aim at providing representation formulae for the so-called Greeks. However, being the parameter infinite dimensional, we need to reinterpret the meaning of the Greeks. In our work we use infinite dimensional Malliavin/Skorokhod calculus and a randomisation technique. The presentation is based on joint work with Fred Espen Benth and Iben Simonsen. The seminar will be on *Zoom*. You can find the information to join below. Speaker: Giulia Di Nunno (Univ. Oslo) Topic: Time: September 30, 2021 05:00 PM Rome Where: Zoom Link: https://us02web.zoom.us/j/86037568156?pwd=cHhvdmdiWUpVYXFjMEo2RWZxM09Rdz09 ID riunione: 860 3756 8156 Passcode: 086446 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 Department of Statistics and quantitative methods University of Milano-Bicocca Via Bicocca degli Arcimboldi, 8 20126 Milano - Italy Phone (0039) 02 64483208 e-mail: emanuela.rosazza1(a)unimib.it ******************************************

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