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9 Oct 2024 - Seminar Anna Fiori
by Enea Bongiorno 02 Oct '24

02 Oct '24

Carissimi colleghi, scusandomi per eventuali invii multipli, vi inoltro il seguente annuncio di seminario. Tutti gli interessati sono invitati a partecipare. Cordialmente, Enea Bongiorno -------------------------------- - when: 9 October 2024, at 16.15 - where: room 206, campus Perrone, via Perrone, 18, Novara. Università del Piemonte Orientale. - on-line: meet.google.com/eic-tuux-rzh Title: *Compositional methods and capital allocation: a proposal * *Speaker: **Anna Fiori, Università degli Studi di Milano-Bicocca* *Abstract*: The capital allocation problem of an insurance company relates to the decomposition of an aggregate risk capital into additive contributions corresponding to different risk sources (e.g., individual agents, business units, specific guarantees included in a set of contracts). The proportions of risk capital allocated to each part can be viewed as quantitative descriptions of the components of a whole, subject to a fixed sum constraint (full allocation). This interpretation suggests interesting connections between capital allocation principles and Compositional Data (CoDa) analysis. The purpose of this work is to introduce a novel allocation framework that prioritizes the compositional perspective. In particular, we propose an optimality criterion based on a (modified) compositional distance between relative losses and capital shares allocated to them. In this way, we explicitly recognize that the relevant information associated with risks arising from –and resources assigned to– each constituent part is indeed information relative to a total. Different from previous research on compositional capital allocations, our approach is not restricted to gradient allocation rules or specific risk measures like VaR or CVaR. We propose instead a general reformulation of the optimal capital allocation problem which is inherently consistent with the relative scale of compositional variables. The resulting capital allocation solutions are compared to other proposals in recent literature and evaluated empirically on a dataset of cyber losses. ----------------------------------- Locandina dell'evento <https://drive.google.com/file/d/1kKe_GZFJ4rnsTJ4PlOGTxDWs6dYYModv/view?usp=…> Seminari Matematici Statistici <https://seminari-ms.uniupo.it/home-page> ----------------------------------- -- Enea G. Bongiorno, Università degli Studi del Piemonte Orientale - Amedeo Avogadro Via Perrone 18, 28100, Novara, Italia Phone: +390321375317 enea.bongiorno(a)uniupo.it upobook.uniupo.it/enea.bongiorno ------ IWFOS 2025 6th International Workshop on Functional and Operatorial Statistics - iwfos2025.uniupo.it <https://iwfos2025.uniupo.it/home> Math-Stat Seminars at UPO seminari-ms.uniupo.it/home-page ------

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IWFOS2025 – SUBMISSION OPEN
by Enea Bongiorno 01 Oct '24

01 Oct '24

*Apologies for cross-posting.* *6th International Workshop on Functional and Operatorial Statistics (IWFOS 2025)* *iwfos2025.uniupo.it* <https://iwfos2025.uniupo.it/> *25-27 June 2025, Novara, Italy* *Dear Colleagues, Dear Friends,* *We are glad to inform you that the *Submission Tool <https://iwfos2025.uniupo.it/information-submission>* is now **open**!* You can now submit a short paper (6 to 8 pages). The LaTeX template and more detailed information are available at iwfos2025.uniupo.it/information-submission. The submission process is managed by the EquinOCS system by Springer. During the process you will be requested to indicate whether the submission is for an oral proposal or a poster by selecting the suitable paper category (talk or poster proposal). All submissions will be reviewed by experts selected by the Scientific Program Committee. *IMPORTANT DEADLINES:* · *December 31, 2024:* Submission deadline · *January 31, 2025:* Notification of the decision · *February 14, 2025:* Revised submission deadline · *February 25, 20*25: Registration for presenters who have an accepted contribution Early submissions are encouraged due to organizational requirements. No extensions will be granted after December 31, 2024. *TOPICS* The congress focuses on topics related to 'infinite-dimensional statistical problems or methods', with a special emphasis on: · Statistical modelling for functional variables · Functional Data Analysis · Operator-based Statistics · Background for Statistics in infinite-dimensional spaces · High-dimensional Statistics We also welcome contributions in Machine Learning to foster relationships between these diverse fields of modern statistics and contribute to their future development. *INVITED SPEAKERS:* · Anne van Delft, Columbia University NY, USA · Holger Dette, RUHR-University Bochum, Germany · Wenceslao Gonzalez Manteiga, University of Santiago de Compostela, Spain · Karel Hron, Palacký University Olomouc, Czech Republic · Ioannis Kalogridis, Katolieke Universiteit Leuven, Belgium · Alessandra Menafoglio, Politecnico di Milano, Italy · Pavlo Mozharovskyi, Telecom Paris, France · Anuj Srivastava, Florida State University, USA · Shahin Tavakoli, University of Geneva, Switzerland · Simone Vantini, Politecnico di Milano, Italy *PUBLICATIONS:* - A *book of proceedings* edited by *Springer*, containing the accepted short papers, will be available online to all participants. - Additionally, a *Special Issue* of the *Journal of Multivariate Analysis* will be initiated from this workshop, open to both workshop presentations and other innovative contributions in the field. Stay tuned for more updates on our website <https://iwfos2025.uniupo.it/>. Thank you for your attention, and we look forward to seeing you in Novara! Best regards, On the behalf of the Chairs, Enea Bongiorno -- Enea G. Bongiorno, Università degli Studi del Piemonte Orientale - Amedeo Avogadro Via Perrone 18, 28100, Novara, Italia Phone: +390321375317 enea.bongiorno(a)uniupo.it upobook.uniupo.it/enea.bongiorno ------ IWFOS 2025 6th International Workshop on Functional and Operatorial Statistics - iwfos2025.uniupo.it <https://iwfos2025.uniupo.it/home> Math-Stat Seminars at UPO seminari-ms.uniupo.it/home-page ------

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Invitation, 7th Asset Pricing Conference by LTI@UniTO | October 8, 2024
by Luca Regis 01 Oct '24

01 Oct '24

Dear Colleagues, please find here below the announcements and links to register and attend (in person or online) the 7th Asset Pricing Conference organised by LTI@UniTo, which will take place at Collegio Carlo Alberto (Torino) on October 8th. Best regards, Luca Regis ---------------------------------------------------------------------------------------------------------- <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeFuBlzkcYLDa5hFz9Ao6/vkxmf…> *7th Asset Pricing Conference by* *LTI@UniTO* *8th October 2024, 10:15 - 18:30* *Fondazione Collegio Carlo Alberto, Piazza Arbarello 8, Torino* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeG13E8ZZjVN4BWYj7TOM/6qij_…> This one-day conference hosted by the Collegio Carlo Alberto aims to promote the highest level and up-to-date research in asset pricing within the European academic community. Speakers and discussants are selected among the most innovative junior researchers and established scholars. One presentation slot is devoted to the PhD candidate for the best paper in Asset Pricing. The winner of this slot for this year is *Thu Nguyen* from the University of Amsterdam. She will receive a discussion from *Fabio Trojani* (University of Geneva, Swiss Finance Institute and University of Torino) during the conference and will be awarded a *prize of €500.* *View the full program* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeG7ugHOWufWYHLrT5lyc/BCUPq…> *Attend in person* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGEm8QDU5pg2NBAD44Ys/V5kf8…> *Follow online* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGLdaZ2RGzpWT0Sx2N98/b2S4s…> *To see future events in Finance and neighboring fields please check our new web page **CCA Finance* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGSV2hrOS9z0Yplh0fjO/-ykto…> *.* *Fondazione Collegio Carlo Alberto* Piazza Arbarello 8 - 10122 Torino, Italy phone: +3901115630800 segreteria(a)carloalberto.org - www.carloalberto.org <https://4z5y5.r.sp1-brevo.net/mk/mr/sh/SMJz09SDriOHTzBFUp7SyDdkW9eU/3Tpc9FH…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGZMUqgLdK8Uef4QyyJe/L-LXQ…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGgDwzVIoUHykUNAxGtu/w7v3q…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGn5P8KFzeRSqJfuvZUA/zeUle…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/SMK1E8tHeGtwrH9DAoaww8yets4Q/ktNFK…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsDhYHcAaQGL7guJhrHpwo/Cht…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsE9szoaymMGHwy95gGZes/90z…> *Founders* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsEcDi11N8SBSD1yTVFJMw/bqm…> <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsF4YQDRlUY6cT5nrKE350/vs6…> *Sostieni il Collegio Carlo Alberto con il 5x1000 | c.f. 94049090015* *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:+39011 15630 800 - privacy(a)carloalberto.org <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsFWt8Ps9qe1mj9dF9Cmn4/R6W…> To find out about the policies regarding the processing of personal data pursuant to articles 13-14 of EU Regulation 2016/679, consult the information at the following link *https://www.carloalberto.org/privacy/* <https://4z5y5.r.sp1-brevo.net/mk/cl/f/sh/1t6Af4OiGsFzDqcIYCjwwzDScyBWV8/_nN…> *Unsubscribe* <https://4z5y5.r.sp1-brevo.net/mk/un/sh/SMJz09a0vkbXq4evGZHG70WrlrGc/z1WfmqA…> *© 2022 Fondazione Collegio Carlo Alberto*

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Workshop "Mathematics for our Health 2024" (M4H), 7-8 Novembre 2024, Politecnico di Milano
by Laura Maria Sangalli 30 Sep '24

30 Sep '24

Care Colleghe e Colleghi, Siamo lieti di annunciare il workshop "Mathematics for our Health 2024" (M4H), che si terrà il 7 e 8 Novembre 2024 presso il Politecnico di Milano, nell’ambito delle attività del finanziamento “Dipartimento di Eccellenza” a favore del Dipartimento di Matematica. Si ricorda soprattutto che il workshop è aperto anche ai contributi di giovani ricercatori sotto forma di poster. La registrazione dei poster è aperta fino al 15 Ottobre 2024. Per maggiori informazioni e per registrarsi, è disponibile il sito web: https://www.mate.polimi.it/events/M4H24/ Cordiali saluti, Il comitato scientifico e organizzatore del workshop M4H —— Laura Maria Sangalli MOX - Dipartimento di Matematica Politecnico di Milano Piazza Leonardo da Vinci 32 20133 Milano - Italy (+39) 02 2399 4554 laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it> https://sangalli.faculty.polimi.it

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Seminar Dario Spanò @LUISS
by Alessia Caponera 30 Sep '24

30 Sep '24

Dear all, The Department of Economics and Finance at LUISS University in Rome (*https://economiaefinanza.luiss.it <https://economiaefinanza.luiss.it/>*) is pleased to announce the following seminar: *Speaker*: Dario Spanò, Warwick University *Title*: *Dualities and Intertwinings in the Two-Parameter Poisson-Dirichlet Diffusion* *When*: October 3rd, 12:00 *Where*: Viale Romania, 32 00197 Rome *Meeting room*: TD2 AB *Abstract*: Mathematical population genetics has been an incredible culture broth for the recent developments of the modern theory of stochastic duality. Duality in genetics clarifies the intrinsic link between forward-in-time dynamics of a population’s allele frequencies evolution and backward-in-time dynamics of the same population’s ancestry. I will show that a duality with very much the same genetic ancestral structure can be established for an infinite-dimensional diffusion – the Two-parameter Poisson-Dirichlet diffusion – helping significantly the tractability of such processes for simulation and inference. *Webpage*: https://economiaefinanza.luiss.it/research-seminar/dualities-and-intertwini… *Should you be interested, please kindly send me an email.* Best wishes, Alessia Caponera

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Winter School on Fractional Calculus and Processes in Växjö, Sweden
by Lorenzo CRISTOFARO 30 Sep '24

30 Sep '24

Con preghiera di diffusione Dear Colleagues, We would like to draw your attention to the Winter School on Fractional Calculus and Processes, held December 4- December 7, 2024 at the Linnæus University in Växjö, Sweden. The school is targeted at PhD-students and PostDocs. Master students are also welcome. Participation is free, but registration is mandatory via an e-mail to Wolfgang Bock (wolfgang.bock(a)lnu.se<mailto:wolfgang.bock@lnu.se>). Our aim is to bring together young researchers for scientific exchange, networking and discussions on career paths. Participants are encouraged to give a talk or to present a poster (please indicate this in the registration mail). There will be compact courses on Fractional Calculus by Giacomo Ascione and on Stochastic Analysis of Fractional Processes by Wolfgang Bock. We hope to spend an exciting week with you, framed by the wonderful Swedish winter landscape. Note that the winter school can easily combined with a participation of the First Lucia Workshop on Fractional Calculus and Processes at the Linnæus University in Växjö, Sweden the week after. Please visit the conference webpage for more information: https://lnu.se/en/meet-linnaeus-university/current/events/2024/lufcap2024/ and indicate in the registration mail, if you want to participate the conference, too. With best regards Wolfgang Bock, Andreas Petersson, Lorenzo Cristofaro, and Ihsan Arharas

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Seminario Christian Hirsch - Politecnico di Milano - 10 Ottobre 2024
by Luca Scarpa 30 Sep '24

30 Sep '24

Si segnala il seguente seminario a tutti gli interessati. Giovedì 10 Ottobre 2024, ore 14:30. Aula Seminari III Piano, Dipartimento di Matematica, Politecnico di Milano. Speaker: Christian Hirsch, Aarhus University. Title: Large deviations of one-hidden-layer neural networks. Abstract: In this talk, I will present large deviations in the context of stochastic gradient descent for one-hidden-layer neural networks with quadratic loss. I will explain how to derive quenched and annealed large deviation principle for the empirical weight evolution during training when letting the number of neurons and the number of training iterations simultaneously tend to infinity. The weight evolution is treated as an interacting dynamic particle system. The distinctive aspect compared to prior work on interacting particle systems lies in the discrete particle updates, simultaneously with a growing number of particles. This talk is based on joint work with Daniel Willhalm. Link Zoom: <http://polimi-it.zoom.us/j/94501257503> Join our Cloud HD Video Meeting<http://polimi-it.zoom.us/j/94501257503> polimi-it.zoom.us<http://polimi-it.zoom.us/j/94501257503> [zoom.ico]<http://polimi-it.zoom.us/j/94501257503> Link Seminario Polimi: <https://www.mate.polimi.it/eventi/?id=2487> Eventi Dipartimento di Matematica - Politecnico di Milano<https://www.mate.polimi.it/eventi/?id=2487> mate.polimi.it<https://www.mate.polimi.it/eventi/?id=2487> [apple-touch-icon-152x152-precomposed.png]<https://www.mate.polimi.it/eventi/?id=2487> ----- Prof. Luca Scarpa, PhD Associate Professor in Probability Department of Mathematics Politecnico di Milano Via E. Bonardi 9 20133 Milano, Italy e.mail: luca.scarpa(a)polimi.it<mailto:luca.scarpa@polimi.it> url: https://sites.google.com/view/lucascarpa

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Announcement of the school "Statistical Mechanics of Spin Glasses, Neural Networks and Learning"
by Pietro Caputo 30 Sep '24

30 Sep '24

Ricevo e inoltro con piacere: ----------------- The Hausdorff School of Mathematics of the University of Bonn will host a Special Topic School on *"Statistical Mechanics of Spin Glasses, Neural Networks and Learning"* from 16-20 June 2025. The school consists of four series of lectures by Elena Agliari (Sapienza University of Rome) Gérard Ben Arous (CIMS, New York University) Aukosh Jagannath (University of Waterloo, Canada) Andrea Montanari (Stanford University) These will be complemented by selected lectures and discussions. This school will provide a unique opportunity for graduate students and post-doctoral researchers in probability theory and mathematical physics who are interested in these topics to gain in-depth knowledge from leading researchers. Applications can be submitted online (by clicking on the "Submit new application" button) at https://www.mathematics.uni-bonn.de/hsm-school/programs/schools/hsm-special… The University of Bonn and HCM are committed to diversity and equal opportunities. Applications from women are therefore strongly encouraged. Please contact me if you have any questions. On behalf of the Organising Committee Véronique Gayrard veronique.gayrard(a)math.cnrs.fr

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Seminario PRISMA mar 8 ott 2024
by Francesco Caravenna 28 Sep '24

28 Sep '24

Seminari on-line del gruppo UMI - PRISMA (http://www.umi-prisma.polito.it/) I seminari PRISMA hanno un formato di "colloquium" per creare un'occasione di scambio e discussione con tutta la comunità dei probabilisti e statistici italiani. Ogni giornata comprende due relatori che tengono due seminari di 30 minuti strettamente connessi, per presentare alla comunità una prospettiva sul proprio ambito di ricerca. Da quest'anno le registrazioni dei seminari vengono pubblicate sul canale YouTube dell'UMI: https://youtube.com/playlist?list=PLmySpc-jrtAMq84VH71evyqPc1hl6eEQb Il prossimo appuntamento è per martedì 8 ottobre 2024. I relatori saranno Giovanni Conforti (Università di Padova) e Giacomo Greco (Università di Roma Tor Vergata) che parleranno di Una passeggiata sui ponti di Schrödinger: dalla meccanica statistica all’algoritmo di Sinkhorn con il seguente orario: 16:00 Primo seminario 16:30 Pausa e discussione 16:45 Secondo seminario 17:15 Conclusione e discussione Trovate di seguito il riassunto. I seminari verranno trasmessi via Zoom al seguente link: https://uniroma1.zoom.us/j/88679569146 Meeting ID: 886 7956 9146 Vi aspettiamo numerosi! Valentina Cammarota e Francesco Caravenna %%%%%%%%%%%%%%%%%%%%%%%%%%%% RELATORI: Giovanni Conforti (Università di Padova) e Giacomo Greco (Università di Roma Tor Vergata) TITOLO: Una passeggiata sui ponti di Schrödinger: dalla meccanica statistica all’algoritmo di Sinkhorn. RIASSUNTO: Nel 1931, E.Schrödinger si interessò al problema di calcolare l’evoluzione più probabile di una nube di particelle Browniane indipendenti condizionatamente all’osservazione della loro configurazione agli istanti iniziale e finale. In linguaggio moderno, questo problema, detto problema di Schrödinger, viene formulato rigorosamente attraverso la teoria delle grandi deviazioni come un problema di minimizzazione entropica con vincoli marginali. Molti anni dopo, T.Mikami scoprì che il problema di Schrödinger converge verso il problema del trasporto ottimo, detto di Monge-Kantorovich, nel limite di rumore piccolo. Questo collegamento, che permette di vedere il problema di trasporto entropico come una regolarizzazione del problema deterministico, è stato largamente sfruttato negli ultimi anni nel contesto dello statistical machine learning. Il motivo principale di questo interesse è che il problema del trasporto entropico si può risolvere con un algoritmo veloce e di facile implementazione, l’algoritmo Sinkhorn. Tale algoritmo, introdotto negli anni '60, richiede solamente alcune semplici operazioni tra matrici, come la moltiplicazione componente per componente: in particolare, non è necessaria alcuna inversione di matrice. Dal punto di vista teorico, l’attrattiva principale risiede nella convergenza esponenziale nel numero di iterazioni. Tuttavia, la comprensione di questo fenomeno è ancora incompleta, per esempio nel caso base del costo quadratico, e più in generale per problemi di trasporto con costi non limitati e marginali a supporto non compatto. Anche per misure discrete, ci sono ancora numerose questioni aperte, per esempio riguardo alla dipendenza del tasso di convergenza dal parametro di regolarizzazione. L’obiettivo della prima parte di questo seminario è di introdurre il problema di Schrödinger come problema di meccanica statistica, esporre il collegamento con il problema di Monge Kantorovich, e introdurre l’algoritmo di Sinkhorn. Nella seconda parte il seminario si concentrerà sul problema della convergenza esponenziale, offrendo una panoramica su risultati più o meno recenti e le diverse tecniche di dimostrazione, e presentando alcune domande aperte. %%%%%%%%%%%%%%%%%%%%%%%%%%%%

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Seminario Alice Callegaro
by Gustavo Posta 26 Sep '24

26 Sep '24

Martedì 1 Ottobre 2024 alle 14:00 presso la Sala di Consiglio del dipartimento di Matematica "G. Castelnuovo" dell'Università degli studi di Roma "la Sapienza", Alice Callegaro (Technische Universität München) terrà il seminario dal titolo: Survival and complete convergence for a branching annihilating random walk Abstract: We study a branching annihilating random walk in which particles move on the discrete lattice in discrete generations. Each particle produces a poissonian number of offspring which independently move to a uniformly chosen site within a fixed distance from their parent's position. Whenever a site is occupied by at least two particles, all the particles at that site are annihilated. This can be thought of as a very strong form of local competition and implies that the system is not monotone. For certain ranges of the parameters of the model we show that the system dies out almost surely or, on the other hand, survives with positive probability. In an even more restricted parameter range we strengthen the survival results to complete convergence with a non-trivial invariant measure. A central tool in the proof is comparison with oriented percolation on a coarse-grained level, using carefully tuned density profiles which expand in time and are reminiscent of discrete travelling wave solutions. Based on a joint works with Matthias Birkner, Jiří Černý, Nina Gantert and Pascal Oswald. Tutti gli interessati sono invitati a partecipare. ---------------------------------------------------------------- Gustavo Posta Dipartimento di Matematica Università di Roma "la Sapienza" P.le A. Moro 2, 00185 Roma Italy web: http://www1.mat.uniroma1.it/~posta e-mail: gustavo.posta(a)uniroma1.it phone: +39-06-4991-4969 ------------------------------------------------------------------ -- *Fai crescere le giovani ricercatrici e i giovani ricercatori*** *con il 5 per mille alla Sapienza* Scrivi il codice fiscale dell'Università *80209930587 **Cinque per mille <https://www.uniroma1.it/it/node/23149>*

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