- Random - Mailing list — Dipartimento di Matematica, UniPI

ABS25 (Applied Bayesian Statistics) summer school in Genova, Italy, 3-6/6/2025
by Elisa Varini 05 Mar '25

05 Mar '25

We are pleased to inform you that registration and fee payment are now possible for the next Applied Bayesian Statistics summer school - ABS25 to be held from 3 to 6 June 2025 in the beautiful historic city of Genova, overlooking the Ligurian Sea in Italy. Website: https://abs25.imati.cnr.it/ <https://abs25.imati.cnr.it/> The school is organized by CNR IMATI (Institute of Applied Mathematics and Information Technologies at the Italian National Research Council in Milano), in cooperation with the Department of Mathematics of the University of Genova. The topic will be SPATIO-TEMPORAL METHODS IN ENVIRONMENTAL EPIDEMIOLOGY The lecturer will be Prof. ALEXANDRA SCHMIDT (McGill University, Department of Epidemiology, Biostatistics and Occupational Health, Canada), with the support of Dr. CARLO ZACCARDI (University G. d'Annunzio Chieti-Pescara, Department of Economics, Italy). As in the past (since 2004), there will be a combination of theoretical and practical sessions, along with presentations by participants about their work (past, current and future) related to the topic of the school. OUTLINE: This course aims to explore the interface between environmental epidemiology (EE) and spatio-temporal modelling (ST). The aim of EE is to understand the adverse health effects of environmental hazards and to estimate the risks associated with those hazards. Such risks have traditionally been assessed either over time at a fixed point in space or over space at a fixed point in time. ST modelling characterizes the distribution of those hazards and associated risks over both geographical locations and time. Understanding variation and exploiting dependencies over both space and time greatly increases the power to assess those relationships. The course will cover a wide range of topics from an introduction to spatio-temporal and epidemiological principles along with the foundations of ST modeling, with specific focus on their application, to new directions for research. Topics to be covered: - Types of epidemiological studies: cohort, case–control, ecological - Measures of risk: relative risks, odds ratios, absolute risk, sources of bias, assessing uncertainty - Bayesian statistics and computational techniques: Markov Chain Monte Carlo (MCMC) - Regression models in epidemiology: Logistic and Poisson generalized linear models, hierarchical models - Dynamic linear models, temporal autocorrelation - Spatial models: area and point referenced methods, mapping, geostatistical methods, spatial regression - Spatial-temporal models: separable models, non-separable models, modelling exposures in space and time. Reference: Shaddick, G., Zidek, J.V., & Schmidt, A.M. (2023). Spatio–Temporal Methods in Environmental Epidemiology with R (2nd ed.). Chapman and Hall/CRC. https://doi.org/10.1201/9781003352655 <https://doi.org/10.1201/9781003352655> We hope you will be interested in the school, and we would like to meet you in Genova. We invite you also to share the information with people potentially interested. Best regards Elisa Varini and Fabrizio Ruggeri Executive Director and Director of ABS25

1 0

Seminario Matteo Brachetta - Politecnico di Milano - 13 Marzo 2025
by Luca Scarpa 04 Mar '25

04 Mar '25

Si segnala il seguente seminario a tutti gli interessati. Giovedì 13 Marzo 2025, ore 11:45. Aula Seminari VI Piano, Dipartimento di Matematica, Politecnico di Milano. Speaker: Matteo Brachetta, Università di Genova. Title: Risk measures and optimal reinsurance: finding a connection via BSDEs. Abstract: The aim of this talk is to connect utiility maximization problems and the optimization of dynamic risk measures, which are usually considered as two different branches or approaches to financial problems. A reinsurance contract allows an insurance company to transfer part of the risk to another company, namely the reinsurer, in order to reduce the future losses, which are usually modeled as a marked point process. Finding the optimal reinsurance agreement translates into a stochastic control problem for the insurer. Recently, some authors showed that the optimal value process for the utility maximization problem can be characterized as the solution of a BSDE with jumps. In other works, it is proved that some BSDEs induce dynamic risk measures, which can be financially interpreted as a default time and an associated mark. In this talk we aim to explore the properties of the risk measure induced by the optimal reinsurance policy under dierent risk models with jumps. The talk is based on a work in progress with Fulvia Confortola (Politecnico of Milan). Link Zoom: <https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> Join our Cloud HD Video Meeting<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> polimi-it.zoom.us<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> [zoom.ico]<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> Link Seminario Polimi: <https://www.mate.polimi.it/Eventi/?id=2550&sezione_di_ricerca=&stringa=&sub…> Eventi Dipartimento di Matematica - Politecnico di Milano<https://www.mate.polimi.it/Eventi/?id=2550&sezione_di_ricerca=&stringa=&sub…> mate.polimi.it<https://www.mate.polimi.it/Eventi/?id=2550&sezione_di_ricerca=&stringa=&sub…> [apple-touch-icon.png]<https://www.mate.polimi.it/Eventi/?id=2550&sezione_di_ricerca=&stringa=&sub…> ----- 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

1 0

Seminario Elena Montanaro - Politecnico di Milano - 13 Marzo 2025
by Luca Scarpa 04 Mar '25

04 Mar '25

Si segnala il seguente seminario a tutti gli interessati. Giovedì 13 Marzo 2025, ore 11:00. Aula Seminari VI Piano, Dipartimento di Matematica, Politecnico di Milano. Speaker: Elena Montanaro, Università La Sapienza. Title: An epidemic model using GW trees and coupon collectors. Abstract: We describe a model for information or viral transmission on the complete graph $\mathbb{K}_n$. Each node is an individual which may be susceptible, infected or recovered. This model has been introduced by Comets et al. with the main goal of studying the asymptotic behavior, as $n$ goes to infinity, of the duration of the infection and of the proportion of infected individuals in the population. The results rely on two interesting stochastic processes: the GW process and the coupon collector process. We discuss some extensions of this problem Link Zoom: <https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> Join our Cloud HD Video Meeting<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> polimi-it.zoom.us<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> [zoom.ico]<https://polimi-it.zoom.us/j/95837122103?pwd=hXtbnj0t8rpSbybIkhGUYwEjZ1dgxN.1> Link Seminario Polimi: <https://www.mate.polimi.it/Eventi/?id=2549&sezione_di_ricerca=&stringa=&sub…> Eventi Dipartimento di Matematica - Politecnico di Milano<https://www.mate.polimi.it/Eventi/?id=2549&sezione_di_ricerca=&stringa=&sub…> mate.polimi.it<https://www.mate.polimi.it/Eventi/?id=2549&sezione_di_ricerca=&stringa=&sub…> [apple-touch-icon.png]<https://www.mate.polimi.it/Eventi/?id=2549&sezione_di_ricerca=&stringa=&sub…> ----- 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

1 0

Seminario PRISMA lunedì 3 marzo 2025 - G. Cannizzaro & F. Toninelli
by Sonia Mazzucchi 03 Mar '25

03 Mar '25

Buongiorno, ricordiamo che *oggi lunedì 3 marzo dalle 16:30 alle 17:45* si terrà il seminario 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. Le registrazioni dei seminari vengono pubblicate sul canale YouTube dell'UMI: https://youtube.com/playlist?list=PLmySpc-jrtAMq84VH71evyqPc1hl6eEQb I relatori di oggi saranno *Giuseppe Cannizzaro* (University of Warwick) e *Fabio Toninelli* (Technical University of Vienna) che parleranno di: Teorema del Limite Centrale superdiffusivo per l'equazione di Burgers stocastica alla dimensione critica. con il seguente orario: 16:30 Primo seminario 17:00 Pausa e discussione 17:15 Secondo seminario 17:45 Conclusione e discussione Trovate di seguito il riassunto. I seminari verranno trasmessi via Zoom al seguente link: https://unipd.zoom.us/j/81175434050?pwd=hCozT8gqnlu49Io6LawZWAwLDrnaJ7.1 Meeting ID: 811 7543 4050 Passcode: 871716 Vi aspettiamo numerosi! Alberto Chiarini e Sonia Mazzucchi %%%%%%%%%%%%%%%%%%%%%%%%%%%% RELATORI: Giuseppe Cannizzaro (University of Warwick) e Fabio Toninelli (Technical University of Vienna) TITOLO: Teorema del Limite Centrale superdiffusivo per l'equazione di Burgers stocastica alla dimensione critica RIASSUNTO: L'equazione di Burgers Stocastica (EBS) è stata introdotta da van Beijren, Kutner and Spohn per modellizzare sistemi diffusivi asimmetrici con una singola quantità conservata (e.g. il modello di esclusione semplice asimmetrico). Nella dimensione sub-critica d=1, EBS coincide con la derivata dell'equazione KPZ il cui comportamento a grandi scale è superdiffusivo con crescita polinomiale e le cui fluttuazioni coincidono con il KPZ Fixed Point, mentre nelle dimensioni super-critiche d>2, è diffusivo e converge a un'equazione del calore stocastica anisotropica. Alla dimensione critica, è stato congetturato che la EBS sia superdiffusiva con crescita logaritmica con un esponente preciso ma ciò è stato mostrato solo modulo correzioni di ordine inferiore. Il presente seminario è basato su un lavoro assieme a Quentin Moulard https://arxiv.org/abs/2501.00344, in cui indentifichiamo la superdiffusività e deriviamo le asintotiche della matrice di diffusione in modo esatto. Inoltre, dimostriamo che nel limite di scala corretto, ovvero che tiene presente della crescita logaritmiche alla diffusività, la soluzione di EBS soddisfa un teorema del limite centrale. Il nostro è il primo limite di scala superdiffusivo per un'equazione alle derivate parziali stocastica critica, al di là dell'ambito di applicabilità della teoria delle strutture di regolarità di Hairer. %%%%%%%%%%%%%%%%%%%%%%%%%%%%

1 0

Seminario Padova - Marc Hoffman
by alekos.cecchin＠unipd.it 01 Mar '25

01 Mar '25

Buongiorno a tutti, Vorremmo segnalarvi che venerdì prossimo (7 Marzo) in aula 2BC30 (Torre Archimede, Università di Padova) ci sarà un seminario per il ciclo di seminari in Probabilità e Finanza di: Marc Hoffman (Université Paris-Dauphine) <https://www.ceremade.dauphine.fr/~hoffmann/> https://www.ceremade.dauphine.fr/~hoffmann/ Title: Some questions in mathematical statistics linked to evolution PDEs Date: March 7, 2025, at 14:30, room 2BC30 Abstract: Evolution models in applications are often analysed via PDEs, interpreted as a macroscopic decription of the phenomenon of interest. This classical approach is nevertheless challenged by empirical data for model validation, especially when the phenomenon of interest does not depend on well established physical laws. In particular the statistical inference of parameters (estimation and testing) requires a underlying stochastic model. This is usullay treated via some addition of noise, sometimes artificially and always a bit arbitrarily. Relying on some specific examples that appear in population biology (cell growth, human demography) or agent-based models in economy, we propose an alternative approach. Starting from a microscopic stochastic model that can be partially observed and for which the PDE of interest is a mean-field limit, the intrinsic statistical noise becomes the fluctuation between the empirical measure of the particle system and the solution of the PDE. We will outline a rigorous statistical program in this setting and will give some results on McKean-Vlasov models that shall emphasise the interest of our approach. Vi aspettiamo numerosi! Alberto Chiarini e Alekos Cecchin Sito web del seminario: https://www.math.unipd.it/~chiarini/seminars/

1 0

Ait-Sahalia seminar in Verona, 14/3/2025
by Cecilia Mancini 28 Feb '25

28 Feb '25

Professor Yacine Ait-Sahalia will give the seminar So Many Jumps, So Little News At the Department of Economics of the University of Verona, on Friday, March 14, 2025, at noon (12 pm) Via Cantarane 24, Vaona Room, 1st floor It will be possible also to attend on Zoom here https://univr.zoom.us/j/93150650381 All the interested people are warmly invited to attend Abstract This paper relates jumps in high frequency stock prices to firm-level, industry and macroeconomic news, in the form of machine-readable releases from Thomson Reuters News Analytics. We find that most relevant news, both idiosyncratic and systematic, lead quickly to price jumps, as market efficiency suggests they should. However, in the reverse direction, the vast majority of price jumps do not have identifiable public news that can explain them, in a departure from the ideal of a fair, orderly and efficient market. We show that jumps without news do not correlate with observable proxies for asymmetric or private information, and that microstructure-driven variables have only limited power to help predict the occurrence of jumps without news.

1 0

PhD Positions in Mathematics – University of Bologna
by Andrea Pascucci 28 Feb '25

28 Feb '25

*PhD Positions in Mathematics – University of Bologna* The call for applications for *six PhD positions* in Mathematics is now open https://unibo.it/en/study/phd-professional-masters-specialisation-schools-a… *Deadline: April 3rd, 2025.* -- --------------------------------------------------------------- Andrea Pascucciandrea.pascucci(a)unibo.it Dipartimento di Matematica P.zza di Porta S. Donato, 5 40126 Bologna - Italy Office Tel. +39-0512094428 Fax +39 0510821834 https://sites.google.com/view/andrea-pascucci/ Skype: andrea.pascucci https://unibo.zoom.us/j/8625962910 --------------------------------------------------------------- L'inferno dei viventi non è qualcosa che sarà: se ce n'è uno, è quello che è già qui, l'inferno che abitiamo tutti i giorni, che formiamo stando insieme. Due modi ci sono per non soffrirne. Il primo riesce facile a molti: accettare l'inferno e diventarne parte fino al punto di non vederlo più. Il secondo è rischioso ed esige attenzione e apprendimento continui: cercare e saper riconoscere chi e cosa, in mezzo all'inferno, non è inferno, e farlo durare, e dargli spazio. Italo Calvino

1 0

Seminar Brunero Liseo @Luiss
by Alessia Caponera 28 Feb '25

28 Feb '25

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*: Brunero Liseo, Sapienza University of Rome *Title*: A Multivariate Copula-Based Conformal Bayesian Framework for Doping Detection *When*: March 6th, 14:30 *Where*: Viale Romania, 32 00197 Rome *Meeting room*: 405 *Abstract*: Doping control is an essential component of anti-doping organizations for protecting sports competitions. Since 2009, this mission has been complemented worldwide by the Athlete Biological Passport (ABP), which monitors athletes’ profiles over time. The practical implementation of the ABP is based on a Bayesian framework, called ADAPTIVE, intended to identify individual reference ranges outside of which an observation may indicate doping abuse. Currently, this method follows a univariate approach, relying on simultaneous analysis of different markers. This work extends the ADAPTIVE method to a multivariate testing framework, making use of copula models to couple the marginal distribution of biomarkers with their dependence structure. After introducing the proposed copula-based hierarchical model, we discuss our approach to inference, grounded in a Bayesian spirit, and present an extension to multidimensional predictive reference regions. We guarantee exact coverage of the regions through the use of a conformal prediction approach. Focusing on the hematological module of the ABP, we evaluate the proposed framework in both data-driven simulations and real data. Based on joint work with Nina Deliu. *Webpage*: https://economiaefinanza.luiss.it/research-seminar/a-multivariate-copula-ba… *Should you be interested, please kindly send me an e-mail.* Best wishes, Alessia Caponera

1 0

INTERNATIONAL WORKSHOP ON STATISTICAL MODELLING - Limerick
by Laura Maria Sangalli 27 Feb '25

27 Feb '25

Gentili Colleghi, mi è stato chiesto di inoltrare l’annuncio del 39TH INTERNATIONAL WORKSHOP ON STATISTICAL MODELLING. Ho appena accettato di tenere il corso di 1 giorno associato al workshop, in sostituzione del corso precedentemente pianificato, che è stato cancellato per via di un problema del docente. Un caro saluto, Laura Sangalli ************************************************************* Hi all, We have some exciting announcements in relation to IWSM 2025, to be held in Limerick, 13th - 18th July (https://iwsm2025.ie/) * The submission portal for poster submissions is now open, with a deadline of Friday 28th March, 2025. * We are delighted to announce that Laura Sangalli will deliver the Short Course (Sunday July 13th) on the very interesting topic of "Physics-Informed Statistical Learning". * Finally, registration is now open! Note that the Early Bird closes on Friday 25th April, 2025. More information and relevant links can be found below. Our call for papers as poster presentations is now open! We are seeking novel and original contributions to the wider field of Statistical Modelling. Papers providing advances in the development of statistical models that are well motivated by a contemporary data scenario or application problem are particularly welcome. This includes contributions to estimation, inference, and computation for such modelling problems. Papers focusing on applications with important substantive implications as well as methodological issues are welcome, including new developments in Data Science and Machine Learning. Submissions by students and young researchers are particularly encouraged. Poster presentation submission deadline: Friday 28th March, 2025. Invited speakers / short course We have an excellent lineup of top-class invited speakers covering a range of diverse topics in statistical modelling. Speakers and provisional talk titles provided below. * Brendan Murphy | University College Dublin, Ireland Unsupervised record linkage * Ruth King | University of Edinburgh, UK Heterogeneous ecological modelling * Sonja Greven | Humboldt University of Berlin, Germany Additive density-on-scalar regression * Daniele Durante | Bocconi University, Italy Bayesian criminal network modelling * Cynthia Rudin | Duke University, USA Simpler machine learning models * Laura Sangalli | Politecnico di Milano, Italy Physics-informed statistical learning More information can be found here: https://iwsm2025.ie/programme/invited-speakers/ Registration Registration is now open! You can register here: https://iwsm2025.ie/registration/ Note that Early Bird registration closes on 25th April 2025. We are looking forward to seeing you in Limerick this July! Best wishes Kevin Burke on behalf of IWSM 2025 Organising Committee —— 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

1 0

Reminder: Summer School PREDICT - Como Lake, June 16-20, 2025
by Gianmarco Bet 27 Feb '25

27 Feb '25

Dear Colleagues, We would like to remind you that the Summer School PREDICT-PRobabilistic mEthoDs In Complex geometry, will take place at Como Lake, from June 16 to June 20, 2025. There are a few spots left, so we decided to postpone the application deadline to *March 9, 2025*. At this page https://sites.google.com/view/predictcomolake/registration you can find all the information about registration. The aim of this school is to explore how probabilistic techniques can be applied to central problems in complex geometry, with a special focus on the construction of Kähler-Einstein metrics—a topic of significant interest in both geometry and physics. The school includes foundational mini-courses as well as advanced courses on recent research results. Due to the novelty of the topic, the school is designed for Master and Ph.D. students, and of course also for more established researchers. Please see the following page https://sites.google.com/view/predictcomolake/program for the detailed program. For questions, please contact us at predictcomo2025(a)gmail.com We look forward to welcoming you in Como! Warm regards, The organisers Luisa Andreis, Daniele Angella, Luca Avena, Giovanni Bazzoni, Gianmarco Bet e Michela Zedda

1 0