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Seminario Padova - Alex Delalande
by alekos.cecchin＠unipd.it 28 Nov '24

28 Nov '24

Buongiorno a tutti, Vorremmo segnalarvi che venerdì prossimo (29 Novembre) alle ore 14:30 in aula 2BC30 (Torre Archimede, Università di Padova) ci sarà un seminario per il ciclo di seminari in Probabilità e Finanza di: Alex Delalande (EPFL Losanna) https://alex-delalande.github.io Title: Sharper Exponential Convergence Rates for Sinkhorn's Algorithm in Continuous Settings Date: November 29, 2024, at 14:30, room 2BC30 Abstract: In this talk, I will present recent results I obtained in collaboration with Lénaïc Chizat and Tomas Vaškevičius regarding the convergence rate of Sinkhorn's algorithm for solving entropy-regularized optimal transport problems, in the context where at least one of the probability measures, say \mu, admits a density over \R^d. For a semi-concave cost function bounded by c∞ and a regularization parameter λ>0, we obtained exponential convergence guarantees on the dual sub-optimality gap with contraction rates that are polynomial in λ/c∞. This represents an exponential improvement over the known contraction rate 1−Θ(exp(−c∞/λ)) achievable via Hilbert's projective metric. Specifically, we proved a contraction rate value of 1−Θ(λ²/c²∞) when has a bounded log-density. In some cases, such as when is log-concave and the cost function is c(x,y)=−⟨x,y⟩, this rate improves to 1−Θ(λ/c∞). The latter rate matches the one that we derived for the transport between isotropic Gaussian measures, indicating tightness in the dependency in λ/c∞. Our results are fully non-asymptotic and explicit in all the parameters of the problem. Vi aspettiamo numerosi! Alberto Chiarini e Alekos Cecchin Sito web del seminario: https://www.math.unipd.it/~chiarini/seminars/

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PhD positions in Probability at King's College London
by Alexandre Stauffer 27 Nov '24

27 Nov '24

Dear All, There are open PhD positions in Probability at King’s College London with a (flexible) starting date of October 2025. We have fully funded PhD projects in various areas of pure and applied probability. Outstanding candidates with a UK first-class undergraduate degree or international equivalent are encouraged to apply. PhD funding will be available for 3.5-4 years, and includes tuition fees, tax free stipend set at UKRI rate plus London weighting, as well as an allowance for research-related travel. Further information may be found in the links below: https://www.kcl.ac.uk/study-legacy/funding/phd-studentship-interacting-part… https://www.findaphd.com/phds/program/kings-college-london-phd-studentships… Interested candidates are encouraged to contact Sam Johnston (samuel.g.johnston(a)kcl.ac.uk) Alexandre Stauffer (a.stauffer(a)kcl.ac.uk) or any other member of the Probability group via email. Thanks, Alexandre

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Postdoc position in Rome
by Michele Salvi 26 Nov '24

26 Nov '24

Dear All, The Department of Mathematics at the University of Rome, Tor Vergata, is advertising a postdoctoral position in Probability: https://bandi.mur.gov.it/bandi.php/public/fellowship/id_fellow/285852 The position is for two years, with no teaching duties. Candidates with an interest in the geometry of random fields and/or in applications to machine learning will be given priority, but we welcome applications from researchers with a strong background in any area of probability theory. The application deadline is December 27th. For further information, please do not hesitate to contact us: marinucc(a)mat.uniroma2.it <> salvi(a)mat.uniroma2.it <> vigogna(a)mat.uniroma2.it <> Best regards, Michele

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Winter School and Thematic Period on Statistical Mechanics, Nonequilibrium Processes, and Probability – Registration Deadline Extended
by Lorenzo Taggi 26 Nov '24

26 Nov '24

Dear Colleagues, This is the second announcement for the winter school *Statistical Mechanics, Nonequilibrium Processes, and Probability*, which will take place on *February 17-28, 2025*, at the Mathematics Department of Sapienza University, Rome. We are pleased to inform you that the *registration deadline for the school has been extended to December 20, 2024*, and to share the link to the school’s website: https://sites.google.com/view/winterschoolsapienza/home To register, please complete the form available on the website (here <https://sites.google.com/view/winterschoolsapienza/registration?authuser=0> the link). Participation is *free*, but registration is mandatory. The school will also include *short talk sessions* for PhD students and early postdocs. *Lecturers of the February school:* *Week 1 (Feb 17–21):* - 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 (Feb 24–28):* - 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 inaugurate the scientific *Eccellenza* program at Sapienza, titled *Statistical Mechanics and Nonequilibrium Processes*, which will conclude in July 2025. This program includes workshops, doctoral courses, and seminar series. More information about the program will be found on the following website: program <https://sites.google.com/uniroma1.it/excellence-department-mmsp/mmsp-th-per…> . Both the winter school and the *Eccellenza* program will focus on 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, and - large-scale limits. The common thread is the rigorous mathematical investigation of equilibrium and nonequilibrium phenomena and statistical physics models. Our goal is to present current research directions at an accessible level for students and young researchers, fostering collaborative research in these areas. For additional information, do not hesitate to contact us. Best regards, The local coordinators Giada Basile Alessandra Faggionato Vittoria Silvestri Sergio Simonella Lorenzo Taggi

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Carlo Ciliberto at Tor Vergata 03.12
by Michele Salvi 26 Nov '24

26 Nov '24

Dear all, On Tuesday, December 3rd, at 14h00 in Aula Dal Passo of Tor Vergata Math Department, RoMaDS (https://www.mat.uniroma2.it/~rds/events.php) will host Carlo Ciliberto (University College London) with the seminar “Operator World Models for Reinforcement Learning” Abstract: Policy Mirror Descent (PMD) is a powerful and theoretically sound methodology for sequential decision making. However, it is not directly applicable to Reinforcement Learning (RL) due to the inaccessibility of explicit action-value functions. We address this challenge by introducing a novel approach based on learning a world model of the environment using conditional mean embeddings. Leveraging tools from operator theory we derive a closed-form expression of the action-value function in terms of the world model via simple matrix operations. Combining these estimators with PMD leads to POWR, a new RL algorithm for which we prove convergence rates to the global optimum. Preliminary experiments in finite and infinite state settings support the effectiveness of our method. 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…"Tid"%3a"24c5be2a-d764-40c5-9975-82d08ae47d0e"%2c"Oid"%3a"650fc4a8-4cec-4bd2-87bc-90d134074fe6"} <https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw…> The seminar is part of the Excellence Project MatMod@TOV.

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BAYSM 2025: Abstract submission
by filippo ascolani 26 Nov '24

26 Nov '24

The junior section of the International Society for Bayesian Analysis (j-ISBA) is thrilled to announce that the Bayesian Young Statisticians Meeting (BAYSM) 2025 will be held online from 7-11 April 2025. BAYSM is the official conference of j-ISBA and provides a platform for early career researchers in Bayesian statistics to present their work and engage with the Bayesian community as a whole. We are especially excited about our lineup of keynote speakers: Samuel Livingstone (UCL), Julia Palacios (Stanford), Fernando Quintana (UC Chile), Surya Tokdar (Duke), and Stéphanie van der Pas (Amsterdam UMC). We invite contributions from early career researchers on a wide range of topics related to Bayesian theory, methods, and applications. Abstract submissions are now open and will close on January 15, 2025. Don't miss this opportunity to showcase your research, network with peers and senior members of our community, and receive valuable feedback on your work. All details for abstract submission can be found on the conference website: https://baysm2025.github.io/. We look forward to your participation and contributions to BAYSM 2025! For any questions, please write to baysm2025(a)gmail.com. Best regards, the BAYSM 2025 Organizing Committee Filippo Ascolani Jordan Bryan Beatrice Franzolini Matteo Giordano Beniamino Hadj-Amar

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Workshop Volterra Processes and their Application, Padova, 16-17 Dicembre 2024
by Stefania Ottaviano 23 Nov '24

23 Nov '24

Dear all, It is our pleasure to announce the following workshop: *Volterra Processes and their Applications* that will be hosted by the Department of Mathematics "Tullio Levi-Civita" of the University of *Padova*, on *December 16 - 17, 2024*. The workshop aims to provide an exploration of recent advances and possible developments in stochastic Volterra processes and their diverse applications across fields. The workshop also aims to motivate discussion among participants, both leading experts in the field and young researchers, to outline new research directions in this topic. Please use the following link for more information on the (tentative) scientific program and to register for the event https://events.math.unipd.it/Volterra/home There is the possibility of attending the workshop *remotely via Zoom*. Registration is not mandatory, but it is kindly requested for organizational reasons. *Speakers:* * Fabio ANTONELLI (University of L'Aquila) * Giacomo ASCIONE (University of Napoli Federico II, Scuola Superiore Meridionale) * Giorgia CALLEGARO (University of Padova) * Marco MASTROGIOVANNI (University of L'Aquila) * Yuliya MISHURA (Kyiv National University, Ukraine & Mälerdalen University, Sweden) * Beatrice ONGARATO (University of Padova) * Tiziano VARGIOLU (University of Padova) Thank you for your consideration. The organizers, Stefania Ottaviano and Tiziano Vargiolu -- ------------------------------------- Ph.D. Stefania Ottaviano Dipartimento di Matematica Università di Padova E-mail: stefania.ottaviano(a)unipd.it

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Call for Papers: IFIP Performance 2025 (Amsterdam, Nov 11-14, 2025)
by Zocca, A. (Alessandro) 22 Nov '24

22 Nov '24

Dear colleagues, We are excited to announce the call for papers for the IFIP Performance 2025 conference, which will take place at Centrum Wiskunde & Informatica (CWI)<https://www.cwi.nl/en/> in Amsterdam from November 11 to 14, 2025. This conference aims to bring together researchers interested in understanding and improving the performance of communication systems through state-of-the-art quantitative models and solution techniques. The conference website is now live at https://performance2025.sciencesconf.org/. Over the coming weeks, we will update it with detailed information on keynotes, tutorials, workshops, and logistical arrangements. Paper format and topics of interest We invite submissions of research papers that focus on performance-oriented methodologies and their application to various domains. We accept the submission of original and unpublished work in two categories: * Regular papers: Up to 20 pages (excluding references). * Short papers: Up to 10 pages (excluding references). Key areas of interest include, but are not limited to: * Methodologies: Analytical modeling, resource allocation, optimization, machine learning, statistical analysis, simulation, anomaly detection, sustainability analysis, and system performance monitoring. * Application areas: Artificial intelligence and machine learning platforms, blockchain technologies, cloud and edge computing, high-performance computing, cyber-physical systems, IoT, smart grids, social networks, data centers, quantum computing, wireless networks, and privacy and security systems. For a comprehensive list of topics and submission guidelines, please refer to the online call for papers<https://performance2025.sciencesconf.org/resource/page/id/1>. Important dates * Submission site opens: May 1, 2025 * Abstract submission deadline: May 25, 2025 * Full paper submission deadline: June 1, 2025 * Notification to authors: July 30, 2025 Publication options Accepted regular papers will be published in a special Performance Evaluation (PEVA) issue by default, with an extended abstract included in ACM Performance Evaluation Review (PER). Alternatively, authors may opt out of PEVA and choose an expedited review in ACM Transactions on Modeling and Performance Evaluation of Computer Systems (ToMPECS), Queueing Systems: Theory and Applications (QUESTA), or Stochastic Models. We look forward to your submissions and contributions! Best regards, Alessandro Zocca (on behalf of the IFIP Performance 2025 organizers)

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Fwd: assegno di ricerca - Unina e Intesa Sanpaolo Vita e Assicura, PNRR Ecoscoring
by Elvira Di Nardo 22 Nov '24

22 Nov '24

Ricevo ed inoltro. Elvira ************************************************************ Carissim*, vi annuncio che è uscito il bando per un assegno di ricerca post-laurea in area Metodi Matematici dell’Economia e delle Scienze Attuariali e Finanziarie presso il Dipartimento di Scienze Politiche della Federico II, destinati a laureati in una delle classi LM16, LM40, LM56, LM77, LM82, LM83. Il termine per la presentazione delle domande è il 12 Dicembre; le attività dovrebbero partire subito (colloquio il 18 Dicembre, per cominciare dal primo Gennaio 2025) http://www.unina.it/documents/11958/63671196/SPOL_AR_PNRR-172024-STAT-01A_B… Aggiungo che l'assegno è finanziato nell'ambito del PNRR - Spoke 9 dal Centro Nazionale sull'High performance computing, ed è inerente ad un progetto con Intesa Sanpaolo Vita e Assicura sull'Ecoscoring. Vi prego di segnalare questa opportunità a potenziali interessati. Grazie in anticipo per la collaborazione e buon lavoro. Rosaria Simone -- Associate Professor in Statistics Department of Political Science University of Naples Federico II - Italy rosaria.simone(a)unina.it https://www.docenti.unina.it/rosaria.simone -- %------------------------------------------------------- Elvira Di Nardo Dept. Mathematics "G. Peano" University of Torino Via Carlo Alberto 10 10123 Torino, Italia tel. +39 0116702862 fax +39 0116702878 www.elviradinardo.it *https://sites.google.com/view/elviradinardo <https://sites.google.com/view/elviradinardo>* %-------------------------------------------------------

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Workshop On Randomness and Discrete Structures (Groningen, April 7-9, 2025)
by Réka Szabó 22 Nov '24

22 Nov '24

Dear Colleagues, We are pleased to announce the Workshop On Randomness and Discrete Structures (WORDS 2025) 7-9 April 2025 University of Groningen, the Netherlands The workshop will explore various topics related to discrete structures and randomness, including but not limited to percolation, random graphs, and stochastic geometry. The program will feature presentations from the 9 keynote speakers below, as well as contributed talks. - Timothy Budd (Radboud University) - Nicolas Curien (Université Paris-Sud) - Daniel Dadush (Utrecht University) - Zakhar Kabluchko (University of Münster) - Júlia Komjáthy (Delft University of Technology) - Irène Marcovici (Université de Rouen Normandie) - Giovanni Peccati (University of Luxembourg) - Wioletta Ruszel (Utrecht University) - Clara Stegehuis (Twente University) For more information and registration, please visit our website: https://sites.google.com/rug.nl/words2025/home The registration deadline is February 28, 2025. We encourage junior researchers to propose a contributed talk. We look forward to seeing you in Groningen! Best regards, Tobias Müller, Réka Szabó and Gilles Bonnet

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