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Colloquium di Dipartimento a Sapienza -- Jason Miller 29 Ottobre ore 17:00
by Silvestri, Vittoria 23 Oct '26

23 Oct '26

Cari colleghi, Segnalo che Giovedì prossimo a Sapienza *Jason Miller (Cambridge)* terrà il Colloquium di Dipartimento. Seguirà un rinfresco alle 18:00 aperto a tutti i partecipanti. *Data e ora:* Giovedì 29 Ottobre 17:00 *Luogo: *Aula Picone, Dipartimento di Matematica G. Castelnuovo (Roma Sapienza) *Speaker: *Jason Miller (University of Cambridge) *Titolo: *The Ant in the Labyrinth *Abstract: *In 1976, Pierre-Gilles de Gennes posed the problem of the “ant in the labyrinth” to understand diffusion, including heat flow, in disordered media: how does a random walk on a percolation cluster behave over long times and large distances? This question has inspired decades of research in mathematics and physics and was an important motivation for the development of analysis on fractals. The problem is especially subtle at criticality since the large clusters have a fractal structure. Kesten showed in 1986 that in this setting in two dimensions the random walk is subdiffusive, meaning that it spreads out more slowly than an ordinary random walk, but identifying the scaling limit remained a long-standing open problem. In this talk, I will trace the mathematical history of the problem and then present recent work establishing the scaling limit of random walk on two-dimensional critical percolation clusters. This is based on joint work with Valeria Ambrosio, Irina Dankovic, Maarten Markering, and Yizheng Yuan. ******************************** Vittoria Silvestri Associate Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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1-day workshop on Probability and Kinetic Equations (save the date and registration)
by Enrico Scalas 22 Oct '26

22 Oct '26

Dear Colleagues, On 12 November 2026, from 10am, in room 34 of the Department of Statistical Sciences, Sapienza University of Rome, a workshop on Probability and Kinetic Equations will take place. List of speakers Giada Basile: Large deviations and dynamical phase transitions Matteo Quattropani: Aldous’ spectral gap phenomena in stochastic exchange models Nadia Loy: On some kinetic models in econophysics Sergio Simonella: Kinetic limits for classical particle systems: Progress and directions Organisers Lorenzo Facciaroni Costantino Ricciuti Enrico Scalas For further info you can refer to the following web site: https://sites.google.com/uniroma1.it/pke Registration is free, but given that we have a limited number of seats, please send a message to enrico.scalas(a)uniroma1.it by 10 November, if you plan to attend. Best wishes, Enrico Scalas

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Recruitment now open: several PhD studentships in SAMBa CDT, Bath, UK (starting Sep 2027).
by Federico Cornalba 22 Oct '26

22 Oct '26

Dear All, recruitment is now open for several fully funded 4-year PhD studentships in the Centre for Doctoral Training (CDT) in Statistical Applied Mathematics (SAMBa) in Bath, United Kingdom (start date: September 2027). More info can be found here: https://samba.ac.uk/apply-to-samba/ Two important notes: 1. Recruitment is for both UK and international students. 2. Applications are reviewed on a rolling basis, and it is highly recommended to apply by January 2027 in any case. I would be grateful if you could forward this message to all those who may be interested. Many thanks. Best, Federico -------------------------------------------------------------------------- Dr Federico Cornalba Lecturer (Assistant Professor) in Mathematics University of Bath, UK https://sites.google.com/view/federicocornalba/home --------------------------------------------------------------------------

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[Call for Talks & Papers] VieCo26- Vienna-Copenhagen Conference on Financial Econometrics 2026
by Viktoria Schildhammer 21 Oct '26

21 Oct '26

Dear colleagues, We invite submissions for the upcoming Vienna-Copenhagen Conference on Financial Econometrics, taking place at the University of Vienna, Austria from August 13-15th 2026. This long-standing meeting series brings together researchers working on theoretical, methodological, and empirical aspects of financial econometrics, statistics, applied mathematics, and quantitative economics. Topics include (but are not limited to): risk measurement and management, asset pricing, forecasting, high-frequency statistics, market microstructure, derivatives, and machine learning in finance. The conference will take place at the Faculty of Business, Economics and Statistics of the University of Vienna located in the heart of Vienna. This is an in-person meeting only. Keynote Speakers: Lasse Heje Pedersen, Copenhagen Business School Shuping Shi, Macquarie University Michael Wolf, University of Zurich & ADIA Lab Please submit your paper in PDF format via vieco26.isor(a)univie.ac.at Submission Deadline: March 1st, 2026 Organizers: Nikolaus Hautsch, University of Vienna Anders Rahbek, University of Copenhagen Stefan Voigt, University of Copenhagen Please visit our website, https://vieco2026.univie.ac.at, for further information. For inquiries, please contact vieco26.isor(a)univie.ac.at. We are looking forward to your submissions. Best regards, The Organizers

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Seminario di Pietro Caputo a Roma1 (oggi)- Annuncio aggiornato
by Faggionato, Alessandra 21 Oct '26

21 Oct '26

Buongiorno, gli organizzatori mi hanno appena mandato un aggiornamento dell'annuncio inviato poco fa. Sotto l'annuncio aggiornato. Grazie Saluti Alessandra %%%%%%%%%%%%%%%%%%%%%%%%%%% Seminari di Fisica Matematica Dipartimento di Matematica "G. Castelnuovo" Università di Roma La Sapienza Mercoledì 21 ottobre, ore 16:00, *aula B* Pietro Caputo (Università di Roma Tre) *Nonlinear exchange dynamics for spin systems.* Abstract. We discuss a class of nonlinear exchange dynamics for interacting spin systems, inspired by Boltzmann-type equations from kinetic theory. These dynamics provide a nonlinear Monte Carlo approach for sampling Gibbs measures under prescribed magnetization or density constraints. We focus on the Ising and hard-core models and present convergence results showing exponential relaxation to equilibrium in the weak-interaction and low-density regimes, respectively, with optimal decay rates independent of the initial condition. The proofs are based on novel coupling techniques as well as ideas from the Kac program in kinetic theory, including uniform functional inequalities for the associated particle systems. We also discuss some possible algorithmic applications. Tutte le persone interessate sono invitate a partecipare.

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Seminario di Pietro Caputo alla Sapienza - Oggi
by Faggionato, Alessandra 21 Oct '26

21 Oct '26

Buongiorno segnalo il seguente seminario organizzato dal gruppo di Fisica Matematica: Seminari di Fisica Matematica Dipartimento di Matematica "G. Castelnuovo" Università di Roma La Sapienza Mercoledì 21 ottobre, ore 16:00, sala di Consiglio Pietro Caputo (Università di Roma Tre) *Nonlinear exchange dynamics for spin systems.* Abstract. We discuss a class of nonlinear exchange dynamics for interacting spin systems, inspired by Boltzmann-type equations from kinetic theory. These dynamics provide a nonlinear Monte Carlo approach for sampling Gibbs measures under prescribed magnetization or density constraints. We focus on the Ising and hard-core models and present convergence results showing exponential relaxation to equilibrium in the weak-interaction and low-density regimes, respectively, with optimal decay rates independent of the initial condition. The proofs are based on novel coupling techniques as well as ideas from the Kac program in kinetic theory, including uniform functional inequalities for the associated particle systems. We also discuss some possible algorithmic applications. Saluti Alessandra -- ****************************************************************************** Prof. Alessandra Faggionato https://sites.google.com/mat.uniroma1.it/alessandrafaggionato/home Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 123, first floor ******************************************************************************

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Seminario di Probabilità a Sapienza -- Perla Sousi 27 Ottobre ore 14:00
by Silvestri, Vittoria 20 Oct '26

20 Oct '26

Cari colleghi, Segnalo il seguente seminario di Probabilità che si terrà Martedì prossimo a Sapienza. *Data e ora:* Martedì 27 Ottobre 14:00 *Luogo: *Sala di Consiglio, Dipartimento di Matematica G. Castelnuovo (Roma Sapienza) *Speaker:* Perla Sousi (University of Cambridge) *Titolo: *Capacity for branching random walks and percolation *Abstract: *The capacity of a set is a classical notion in potential theory and it is a measure of the size of a set as seen by a random walk or Brownian motion. Recently Zhu defined the notion of branching capacity as the analogue of capacity in the context of a branching random walk. In this talk I will describe joint work with Amine Asselah and Bruno Schapira where we introduce a notion of capacity of a set for critical bond percolation and I will explain how it shares similar properties as in the case of branching random walks. ******************************** Vittoria Silvestri Associate Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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Stochastic Dynamics and Particle Systems - Rome 16-18 February 2027
by Silvestri, Vittoria 20 Oct '26

20 Oct '26

Dear colleagues, We would like to announce the workshop: *Stochastic Dynamics and Particle Systems* *16-18 February 2027*, Dipartimento di Matematica Guido Castelnuovo, Sapienza Università di Roma. The purpose of the workshop is to bring together researchers working in the field of stochastic dynamics and particle systems from different viewpoints. Particular emphasis is placed on modern and future perspectives, as well as the links to other fields and applications. The event will be structured to stimulate discussion and interaction among participants. The program will include a *3 hours mini-course* by Pablo Ferrari (Buenos Aires), invited talks, and sessions on open problems and future directions. Confirmed speakers are: *Invited talks:* Gioia Carinci (Modena) Nicolas Forien (Paris) Ivailo Hartarsky (Lyon) Hubert Lacoin (Rio-Roma) Claudio Landim (Rio-Rouen) Brune Massoulié (Munich) Federico Sau (Milano) Oliver Tough (Durham) Denis Villemonais (Strasbourg) *Open problems:* Bernard Derrida (Paris) Patricia Gonçalves (Lisbon) Ellen Saada (Paris) Cristina Toninelli (Paris) *Registration is now open* until 7 January 2027. Further information, including the program, abstracts, and registration, is available at: https://perso.math.u-pem.fr/aasselah/Roma-2027.html We would be grateful if you could circulate this announcement to anyone who may be interested. Best wishes, Amine Asselah, Quentin Berger, Davide Gabrielli, Vittoria Silvestri ******************************** Vittoria Silvestri Associate Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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Seminar Agazzi at Tor Vergata, 26.10
by Michele Salvi 20 Oct '26

20 Oct '26

Dear all, On Monday, October 26, at 14h00 in Aula Dal Passo in the Math Department of the University of Rome Tor Vergata, RoMaDS (https://www.mat.uniroma2.it/~rds/events.php) will host Andrea Agazzi (University of Bern) with the seminar “Stochastic scaling limits of deep transformer architectures” Abstract: In this talk, we study the evolution of tokens across the depth of randomly initialized transformer models, modeling them as a system of interacting particles driven by common noise in the infinite-depth and infinite-width limits. We focus on the interplay between self-attention and feed-forward layers and its role in the emergence of clustering. Using stochastic analysis, we identify explicit thresholds for local synchronization and relate them to the sign of Lyapunov exponents governing the separation of nearby tokens. We encourage in-person partecipation. Should you be unable to come, here is the link to the Teams streaming: https://teams.microsoft.com/meet/3776556878457324?p=zVF9baAPStALO27KKf The seminar is part of the Excellence Project MatMod@TOV.

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Department Seminar Sapienza University of Rome - Today
by Antonio Agresti 20 Oct '26

20 Oct '26

Dear All, Below is the announcement of today's (October 20) seminar at Castelnuovo (Department of Mathematics, Sapienza University of Rome) in Aula B at 15:30. I hope you can join. Best regards, Antonio Agresti *Speaker: *Nicolas Clozeau (University of Toulon) *Title:** Effective conductivity in random media* *Abstract:* We are interested in computing the electric field generated by a neutral, localized charge distribution in a random medium, modeled by a linear elliptic equation in divergence form. First, I will present results in the homogenization regime, where the medium exhibits scale separation. I will then explain how ideas from homogenization theory can be used to address the case where no scale separation is present. Finally, I will discuss some interesting possible extensions to nonlinear settings. This talk is based on joint work with Felix Otto, Marc Josien, Qiang Xu, and Lihan Wang.

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