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Seminario Jacopo Borga, Martedì 11 Febbraio, Sapienza Università di Roma
by Silvestri, Vittoria 11 Feb '25

11 Feb '25

Segnalo il seguente seminario, che si terrà Martedì prossimo in Sapienza. *Martedì 11 Febbraio, ore 14:00,* Sala di Consiglio, Dipartimento di Matematica, Sapienza Università di Roma *Speaker:* Jacopo Borga (MIT) *Title: *Lattice Yang-Mills theory in the large N limit via sums over surfaces *Abstract:* Lattice Yang-Mills theories are important models in particle physics. They are defined on the d-dimensional lattice Z^d using a group of matrices of dimension N, and Wilson loop expectations are the fundamental observables of these theories. Recently, Cao, Park, and Sheffield showed that Wilson loop expectations can be expressed as sums over certain embedded bipartite maps of any genus. Building on this novel approach, we prove in the so-called strongly coupled regime: - A rigorous formula in terms of embedded bipartite planar maps of Wilson loop expectations in the large N limit, in any dimension d. - An exact computation of Wilson loop expectations in the large N limit, in dimension d=2, for a large family of (simple and non-simple) loops. Previous results to the two aforementioned points were previously established by Chatterjee (2019) and Basu & Ganguly (2016), respectively. Our results extend these previous results, offer simpler proofs and provide a new perspective on these significant quantities. This work is a collaboration with Sky Cao and Jasper Shogren-Knaak. ******************************** Vittoria Silvestri Assistant Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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Fwd: I: Open Doctoral/PhD Position
by Antonio Agresti 10 Feb '25

10 Feb '25

Dear All, Below, you can find the announcement for a PhD position on "Dynamical Systems Uncertainty Quantification for Climate Systems" at TU Munich. Please forward it to possible interested candidates. Best regards, Antonio Agresti ------------------------------ *Da:* Christian Kuehn <ckuehn(a)ma.tum.de> *Inviato:* domenica 9 febbraio 2025 11:56 *A:* ckuehn(a)ma.tum.de <ckuehn(a)ma.tum.de> *Oggetto:* Open Doctoral/PhD Position Dear Colleague, Currently there is an open doctoral/PhD position in my group at Technical University of Munich for a student to start some time in 2025, more details can be found here: https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.multi… <https://www.multiscale.systems/PDF_files/job.pdf> Please feel encouraged to forward this announcement to your local lists and direct colleagues, to collaborative-projects lists, as well as to interested candidates, thank you. Best, Christian -- Christian Kuehn Lichtenberg Professor for Multiscale and Stochastic Dynamics Technical University of Munich https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.multis… <http://www.multiscale.systems/> --

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Submission Deadline Extended – XXVI Workshop on Quantitative Finance (QFW 2025)
by ANDREA CONSIGLIO 10 Feb '25

10 Feb '25

Dear Colleagues, due to numerous requests, we are pleased to announce an extension of the submission deadline for the XXVI Workshop on Quantitative Finance (QFW 2025). The new deadline is now February 28, 2025. We encourage you to take advantage of this extension and submit your paper or extended abstract (minimum four pages) via email to qfw2025(a)unipa.it. For more details, please visit the QFW 2025 website<https://qfw2025.community.unipa.it/>. Best regards, Andrea Consiglio Workshop Organizing Committee QFW 2025 Andrea Consiglio Università di Palermo Dipartimento di Scienze Economiche, Aziendali e Statistiche. Viale delle Scienze, Edificio 13 90128 Palermo, Italy tel:++39-09123895228 fax:++39-091485726 skype: conan_66 email:andrea.consiglio@unipa.it<mailto:email%3Aandrea.consiglio@unipa.it> pec:andrea.consiglio@pec.it<mailto:pec%3Aandrea.consiglio@pec.it> www:http://bit.ly/AndreaConsiglio

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Workshop On Randomness and Discrete Structures (Groningen, April 7-9, 2025)
by Réka Szabó 10 Feb '25

10 Feb '25

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) Self-overlapping lattice polygons - Nicolas Curien (Université Paris-Sud) Scaling limits of the Luczak-Winkler growth algorithm - Daniel Dadush (Utrecht University) Integrality Gaps for Random Integer Programs via Discrepancy - Zakhar Kabluchko (University of Münster) TBA - Júlia Komjáthy (Delft University of Technology) Schramm's locality conjecture for long range percolation cluster size decay and the locality conjecture - Irène Marcovici (Université de Rouen Normandie) A decentralised diagnosis method with probabilistic cellular automata - Giovanni Peccati (University of Luxembourg) On irreducible CLTs - Wioletta Ruszel (Utrecht University) Fermionic structures in random lattice models - Clara Stegehuis (Twente University) Detecting geometry in scale free networks The registration deadline is February 28, 2025. We encourage junior researchers to propose a contributed talk. For more information and registration, please visit our website: https://sites.google.com/rug.nl/words2025/home The workshop is supported by the grant "NWO Scientific Meetings and Consultations Domain Science WBO 2024-1". We look forward to seeing you in Groningen! Best regards, Tobias Müller, Réka Szabó and Gilles Bonnet

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SPASS Seminar: Olga Ariasova
by Francesco Grotto 10 Feb '25

10 Feb '25

Dear Colleagues, We would like to invite you to the following SPASS seminar, jointly organized by UniPi, SNS, UniFi and UniSi: *Homogenization of a multivariate diffusion with semipermeable reflecting interfaces* by Olga Ariasova (Inst. Geophys. Nat. Acad. Sciences of Ukraine, F. Schiller Univ. of Jena) The seminar will take place tomorrow TUE, 11.2.2025 at 14:00 CET in Aula Seminari, Dipartimento di Matematica, UNIPI and streamed online at the link below. The organizers, G. Bet, A. Caraceni, F. Grotto, G. Zanco https://sites.google.com/unipi.it/spass *---------------------------------------------------------* *Abstract: * The mathematical problem of homogenization typically involves studying the effective parameters of a system that exhibits rapid variations in its spatial characteristics. However, we focus on a stochastic multivariate homogenization problem of a different kind: the diffusion in the presence of narrowly located semipermeable interfaces. In simple words, our model reminds of a foiled composite material consisting of a media interlaced with very thin plates of different permeability. In material science such models are referred to as reinforced materials like a glass wool reinforced by aluminium foil. Usually, one is interested in the effective parameters of such a system. By combining the study of stochastic differential equations with local times and homogenization, we explore how the presence of interfaces can alter the diffusion behavior of the limit process. As a byproduct of our research, we obtain theorems for the existence and uniqueness of solutions to SDEs for multidimensional diffusion processes with membranes. Uniqueness is a problem of particular interest because it implies the strong Markov property of the solution, which is essential for the proof of convergence.

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Call for Posters – Workshop on Nonparametric Statistics @Luiss University (May 15-16, 2025)
by Alessia Caponera 10 Feb '25

10 Feb '25

Dear colleagues, We invite early-career researchers (PhD students or scholars within 5 years of obtaining the PhD) to submit a poster for the *Workshop on Nonparametric Statistics*, which will be held at *Luiss University in Rome on May 15-16, 2025*. This event provides an opportunity to present research, receive feedback, and engage with peers in an informal setting. Submission details: - Deadline for submission: March 1, 2025 - Abstract length: Max 1 page - Notification: March 16, 2025 - To submit a poster, please e-mail npstats(a)luiss.it, attaching the abstract. The poster session will be held on May 16, alongside talks by distinguished invited speakers. For more details, visit our website https://sites.google.com/view/wsnpstats/home <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsites.goo…> or e-mail npstats(a)luiss.it. We look forward to your submissions! Best regards, Alessia Caponera On behalf of the Organising committee Alessia Caponera, Marta Catalano, Matteo Iacopini, Marco Perone Pacifico

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PhD positions at Scuola Normale Superiore, Pisa, Italy
by Fabrizio Lillo 09 Feb '25

09 Feb '25

Seven PhD fellowships are available at SNS for students interested in pursuing a PhD degree in* Computational Methods and Mathematical* *Modeling for the Sciences and Finance*. Areas of specialization include: Numerical Analysis and Scientific Computing, Quantitative Finance, Stochastic Analysis, Machine Learning, Computational Chemistry, Computational Biology and Quantum Information Theory. The application deadline is March 6, 2025; start date is November 1, 2025. For application information, see https://www.sns.it/sites/default/files/2025-01/dd_bando_phd_2025-26_sci-sig… (Please note: the English version starts on page 12 of the document.) Further information about the PhD program is available at https://www.sns.it/en/computational-methods-and-mathematical-models-science… ---------------------------------------- Fabrizio Lillo Dipartimento di Matematica, Università di Bologna Scuola Normale Superiore, Pisa ITALY Personal website: fabriziolillo.wordpress.com University website: www.unibo.it/sitoweb/fabrizio.lillo <http://fabriziolillo.wordpress.com/> phone: +39 050509159

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Seminario Padova - Stefan Ankirchner
by alekos.cecchin＠unipd.it 08 Feb '25

08 Feb '25

Buongiorno a tutti, Vorremmo segnalarvi che venerdì prossimo (14 Febbraio) in aula 2BC30 (Torre Archimede, Università di Padova) ci sarà un seminario per il ciclo di seminari in Probabilità e Finanza di: Stefan Ankirchner (Friedrich-Schiller-Universität Jena) Title: Diffusion control ranking games Date: February 14, 2025, at 11:00, room 2BC30 Abstract: The topic of the talk are stochastic differential games where each player can control the diffusion intensity of an individual state process, and the players whose final states are among the highest receive a fixed prize. We take a closer look at the 2 player case and the mean field version of the game. The talk is based on several papers written jointly with Nabil Kazi-Tani, Julian Wendt and Chao Zhou. Vi aspettiamo numerosi! Alberto Chiarini e Alekos Cecchin

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PhD project in Statistical learning methods for functional data
by Marzia Angela Cremona 07 Feb '25

07 Feb '25

Dear all, I have an open PhD position in my group at Université Laval (Quebec CIty, Canada) on the topic "Statistical learning methods for functional data". Requirements and Conditions - Background in statistics, machine learning, data science, or similar - Programming experience (R, Python, Matlab or similar) - Advanced level of English - Intermediate level of French (or willingness to reach an intermediate level before the beginning of the PhD program) Funding: at least 25 000 CAD/year for 4 years (including admission and success support scholarships from the Faculty, as well as supervisor scholarships). Additional funding is available from the Faculty (progression scholarships, funding for conference participation, scholarships for publications, etc.). This amount may be increased by scholarships obtained from external organizations (e.g. FRQ, NSERC, IID, CIRRELT) to which the student must apply. More details at https://www.projets-recherche.ulaval.ca/en/project?id=473373 If interested, please send a cover letter, CV and all student transcript to marzia.cremona(a)fsa.ulaval.ca<mailto:marzia.cremona@fsa.ulaval.ca> Marzia Marzia A Cremona Department of Operations and Decision Systems Université Laval https://marziacremona.com<https://marziacremona.com/> Pavillon Palasis-Prince, local 2449 2325, rue de la Terrasse Québec (Québec) G1V 0A6

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Seminars in Statistics at Collegio Carlo Alberto - Yufei ZHANG (IMPERIAL COLLEGE LONDON)
by Matteo Giordano 07 Feb '25

07 Feb '25

SEMINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.google.com/url?q=https://www.carloalberto.org/events/category/s…> Venerdì 14/02/2025, presso il Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terrà il seguente seminario: ------------------------------------------------ 12.00-13.00 Speaker: Yufei ZHANG (IMPERIAL COLLEGE LONDON) Title: Towards sample-efficient continuous-time reinforcement learning Abstract: Recently, reinforcement learning (RL) has garnered significant research interest. However, much of this attention and success has been focused on the discrete-time setting. RL for continuous-time systems, despite its natural applicability to a wide range of control tasks in physical systems, remains largely unexplored with limited progress. In particular, characterizing the sample efficiency of continuous-time RL algorithms continues to be a challenging and open problem. In this talk, we introduce a principled framework for systematically analyzing regret bounds for continuous-time RL algorithms in episodic model-based settings. Our framework decomposes the regret analysis into two fundamental components: the finite-sample accuracy of model estimation and the performance gap of a greedy policy derived from the estimated models. The finite-sample accuracy is analyzed using filtering theory and concentration inequalities for correlated observations, while the performance gap is quantified by leveraging the robustness of the control problem. By integrating these insights, we optimize the exploration-exploitation trade-off, achieving the best-known sample complexity in the current literature. ------------------------------------------------ Sarà possibile il seminario anche in streaming: chiunque volesse collegarsi è pregato di inviare una email entro *mercoledì 12/02/2025* a matteo.giordano(a)unito.it <mailto:matteo.giordano@unito.it>. Il webinar è organizzato dalla "de Castro" Statistics Initiative (www.carloalberto.org/stats <http://www.carloalberto.org/stats>) in collaborazione con il Collegio Carlo Alberto. Cordiali saluti, Matteo Giordano Assistant Professor (RTDA) Department of Economics, Social Studies, Applied Mathematics and Statistics (ESOMAS) www.matteogiordano.weebly.com <https://matteogiordano.weebly.com/>

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