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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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School "Statistical Mechanics, Nonequilibrium Processes and Probability", Feb 17-28 2025
by Lorenzo Taggi 25 Sep '24

25 Sep '24

Dear Colleagues, We are glad to announce that the winter school Statistical Mechanics, Nonequilibrium Processes and Probability will take place on February 17-28, 2025 in Rome at the Mathematics Department of Sapienza University. The school will inaugurate the scientific Eccellenza program at Sapienza, titled Statistical Mechanics and Nonequilibrium Processes, which will end in June 2025 and will include workshops, doctoral courses and seminar series. The school and the scientific period will be devoted to several topics including kinetic theory and probability, random growth models, percolation, probabilistic models for neural networks, quantum-mechanical transport, non-dissipative transport in topological materials, large scale limits. The common substrate is the investigation of equilibrium and nonequilibrium phenomena and of statistical physics models, with rigorous mathematical methods. Our goal is to expand knowledge in these areas, by presenting current research directions at an introductory level and aimed at students and young researchers, and by fostering new lines of collaborative research. Lecturers of the February school: Week 1 (17-21 Feb) - Kazuo Aoki (National Cheng Kung University & Kyoto University) - Eric Carlen (Rutgers University) - Alessia Nota (University of L'Aquila) - Benjamin Schlein (University of Zurich) Week 2 (24-28 Feb) - Paul Dario (University of Paris-Est Créteil) - Sabine Jansen (Ludwig Maximilian University) - Eva Löcherbach (University of Paris 1) - Fabio Toninelli (Technical University of Vienna) The school will include short talk sessions for early postdocs and PhD students. Financial support will be available to a limited number of young participants. Requests for financial support will open in the fall. The school is free but registration will be mandatory. In a future announcement we will provide the link for registering to the first and/or the second week. For any information do not hesitate to contact us. The organising committee, Giada Basile Alessandra Faggionato Vittoria Silvestri Sergio Simonella Lorenzo Taggi

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Workshop "Mathematics for Planet Earth 2024" 11-12 Novembre @ PoliMi
by Simone Vantini 25 Sep '24

25 Sep '24

Gentili Colleghe e Colleghi, Siamo lieti di annunciare il workshop "Mathematics for Planet Earth 2024" (M4E24), che si terrà l’11 e 12 Novembre 2024 presso il Politecnico di Milano, nell’ambito delle attività del finanziamento MUR “Dipartimento di Eccellenza 2023-2027” a favore del Dipartimento di Matematica del Politecnico di Milano. Questo workshop ha come scopo di evidenziare l’importanza della Matematica nella comprensione della dinamica dei diversi aspetti del nostro pianeta e nell’affrontare le sfide che il nostro pianeta dovrà affrontare nel futuro. Le presentazioni copriranno diversi aspetti: dall’analisi dei cambiamenti climatici, alla gestione delle risorse e alla conservazione del pianeta. Siamo onorati di presentare sei illustri speakers: * Denis Allard, BioSP, INRAE, Francia. Building and simulating complex geostatistical models for climate and environmental sciences * Inga Berre, Università di Bergen, Norvegia. Modeling of heat transfer, multiphase flow, and deformation in fractured geothermal systems * Didier Cloteau, Università di Paris-Saclay, Centrale Supelec, Francia. Mathematical and computational challenges in Probabilistic Seismic Hazard Assessment. * Bernd Flemisch, Università di Stoccarda, Germania. Geological Carbon Storage: Computational Models and their Validation * Taras Gerya, ETH, Svizzera. Biogeodynamics: influence of plate tectonics for life evolution and habitability * Cecilia Stanghellini, Università Wageningen, Olanda. From external climate to climate within a greenhouse: utility and complexity of models La partecipazione al workshop è gratuita ma per motivi organizzativi la registrazione è necessaria. Il workshop è aperto anche ai contributi di giovani ricercatori sotto forma di poster. La scadenza per il caricamento di titolo e abstract dei poster è il 15 ottobre 2024. Per maggiori informazioni è disponibile il sito web: www.mate.polimi.it/events/M4E24/<http://www.mate.polimi.it/events/M4E24/> Cordiali saluti, Il comitato scientifico e organizzatore del workshop M4E24 ____________ Simone Vantini Professor of Statistics MOX Laboratory for Modeling and Scientific Computing Dept. of Mathematics - Politecnico di Milano Piazza Leonardo da Vinci 32, 20133, Milano, Italy

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Seminario di J. Moller al Politecnico di Milano, Mercoledì 9 ottobre
by Mario Beraha 25 Sep '24

25 Sep '24

Buongiorno a tutti, Vi segnalo il seguente seminario in presenza presso il Politecnico di Milano. Il seminario verrà erogato anche in modalità on-line al seguente link https://polimi-it.zoom.us/j/98526429718 9/10/2024, ore 10:00, Aula Saleri 6° Piano, Edifico 14 “La Nave”, campus Leonardo, via Edoardo Bonardi 9, 20133 Milano. Speaker: Jesper Moller, Aalborg University Titolo: The sufficient digits of continuous random variables Abstract: A general setting for nested subdivisions of a bounded real set into intervals defining the digits X_1,X_2, ... of a random variable X with a probability density function f is considered. Under the weak condition that f is almost everywhere lower semicontinuous, a coupling between X and a non-negative integer-valued random variable N is established so that X_1, ...,X_N have an interpretation as the “sufficient digits”, since the distribution of (X_{N+1}, X_{N+2}, ...) conditioned on (X_1, ...,X_N) does not depend on f. The importance of this coupling result and some suggestions and open problems for future research are discussed. Related papers are available on arXiv: arxiv.org/abs/2404.09525 <http://arxiv.org/abs/2404.09525>, arxiv.org/abs/2307.06685 <http://arxiv.org/abs/2307.06685>. Contatto: mario.beraha(a)polimi.it <mailto:mario.beraha@polimi.it> Buona giornata, Mario Beraha

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Postdoctoral positions at the Department of Economics, University of Verona
by Alessandro Gnoatto 24 Sep '24

24 Sep '24

The Department of Economics<http://www.dse.univr.it/?lang=en> of the University of Verona is seeking to fill two Postdoc positions in any field of Financial Mathematics, Economics and Econometrics. Information about the financial mathematics and econometrics group can be found at http://dse.univr.it/quantlab The Department has been designated as a Department of Excellence for years 2023-2027 thanks to the outstanding track record and future vision and it offers a vibrant research environment in the newly built campus of Santa Marta next to the city center. Research conducted by the Department covers a wide range of topics, such as quantitative finance, econometrics, health economics, inequality and poverty, and statistical methods for economic analysis. As a Department of Excellence, we are leading large-scale, transdisciplinary projects and we can count on substantial funding and resources to further strengthen our research over the next 4 years. The research position is ideally meant for newly minted or close to completion PhDs. The appointment is expected to start in Autumn 2025 at the latest. The evaluation will be based on the scientific quality of the candidate and his/her potential in developing research. There are no teaching obligations and knowledge of Italian is not required. The salary is approximately € 35,000 gross per year. Generous tax breaks are available to candidates who have been residing outside of Italy. Applications should be received by October 31, 2024 and should include: * a cover letter with a clear statement of research interests and a motivation for why the candidate would like to join our department * a curriculum vitae * a job market paper * at least two reference letters The application material should be uploaded on the EconJobMarket<https://econjobmarket.org/>. Selected applicants will be interviewed via Zoom on November/December 2024. For additional information or any inquiry please write to postdoc(a)dse.univr.it<mailto:postdoc@dse.univr.it>. Please, if writing an email to this address, do not include links to external websites. -- Prof. Alessandro Gnoatto Presidente del CdLM "Banca e Finanza" Dipartimento di Scienze Economiche Università degli Studi di Verona Via Cantarane 24 37129, Verona, Italy Room 1.05 Tel: +39 045 802 8537<tel:+390458028537> Homepage: www.alessandrognoatto.com<http://www.alessandrognoatto.com/> E-mail: alessandro.gnoatto(a)univr.it<mailto:alessandro.gnoatto@univr.it> -------------------------------------------------- View my research on my SSRN Author page: http://ssrn.com/author=1615989 --------------------------------------------------

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