September 2024 - Random - Mailing list — Dipartimento di Matematica, UniPI

5th Spring Colloquium on Probability and Finance - Padova - 19 April 2024
by Claudio Fontana 02 Apr '25

02 Apr '25

Dear all, We are glad to announce the 5TH SPRING COLLOQUIUM ON PROBABILITY AND FINANCE, held at the Department of Mathematics "Tullio Levi-Civita" of the University of Padova, on APRIL 19TH, 2024. The Colloquium will bring together researchers in stochastic analysis and mathematical finance. The workshop will start at 10am and end at 5pm. Attendance is free but registration is required (on the conference website). Please note that, due to the small capacity of the conference room, we will be able to host only a limited number of attendees. WEBSITE: https://events.math.unipd.it/SpringColloquium5 INVITED SPEAKERS: - Eduardo ABI JABER (École Polytechnique, FR) - Huy Ngoc CHAU (University of Manchester, UK) - Giulia DI NUNNO (University of Oslo, NR) - Roxana DUMITRESCU (King's College London, UK) - David SKOVMAND (University of Copenhagen, DK) - Luca TASCHINI (University of Edinburgh, UK) We hope to see you in Padova! Best wishes, Giorgia Callegaro and Claudio Fontana

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Save the date: Avi Wigderson (Turing award + Abel prize!) at Tor Vergata 31.10
by Michele Salvi 25 Oct '24

25 Oct '24

Dear all, We are honoured to announce that on Thursday, October 31st (15h00, Aula Gismondi) RoMaDS <https://www.mat.uniroma2.it/~rds/events.php> will host at Tor Vergata University Prof. Avi Wigderson (Princeton University, 2023 Turing award and 2021 Abel prize) with the seminar “The value of Errors in Proofs” The seminar is meant for a broad audience, do not hesitate to spread the word with whom might be interested, students included! All the details can be found on the website of the event: https://www.mat.uniroma2.it/~pasquale/seminars/wigderson2024/ https://www.mat.uniroma2.it/~pasquale/seminars/wigderson2024/ We encourage in-person partecipation. Should you be unable to come, here is the link to the Teams streaming: https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw… https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw… The seminar is part of the Excellence Project MatMod@TOV. https://www.mat.uniroma2.it/~rds/events.php Best regards, Michele Salvi

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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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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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