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Seminario di Amichai Painsky presso l'università Bicocca, Mercoledì 4 giugno
by Mario Beraha 27 May '25

27 May '25

Buongiorno a tutti, Vi segnalo il seguente seminario in presenza presso l’università di Milano-Bicocca. 4 giugno 2025, ore 12:00, Aula Seminario 2104, Edificio U7, Via Bicocca degli Arcimboldi, 8, Milano. Speaker: Amichai Painsky, Tel Aviv University Title: Large Alphabet Inference Abstract: Consider a finite sample from an unknown distribution over a large alphabet. Making inference in a large alphabet regime is a fundamental problem in statistics and related fields, which entails several basic challenges. For example, how accurately can we infer the parameters of events that do not appear in the sample? What can we say about the most frequent events in the sample? The entire underlying distribution? In this talk we introduce a novel inference scheme that tackles these challenging problems. Our proposed framework applies selective inference, as we construct confidence intervals (CIs) for the desired set of parameters. Interestingly, we show that obtained CIs are dimension-free, as they do not grow with the alphabet size. Further, we show that our CIs are (almost) tight, in the sense that they cannot be further improved without violating the prescribed coverage rate. Contatto: riccardo.corradini(a)unimib.it<mailto:riccardo.corradini@unimib.it> Buona giornata, Mario Beraha

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Short courses in GSSI trimester
by Lu Xu 27 May '25

27 May '25

Dear colleagues and friends, we are glad to announce the forthcoming short courses and seminar in GSSI in June: June 3-5 (short cours) & June 6 (seminar): Prof. Gian Michele Graf (ETH Zurich) June 10-12: Prof. Lenya Ryzhik (Stanford) Please see at the end of the email for the detailed information. Registration is free through the web form: https://indico.gssi.it/event/745/. Other courses hosted by the trimester can be found here: https://trimester2025.math.gssi.it/all_courses/. We would be grateful if you could circulate the announcement among potentially interested students and researchers. For any information do not hesitate to contact us (patterns(a)gssi.it<mailto:patterns@gssi.it>). ———————————————— Venue: Main Lecture Hall, Gran Sasso Science Institute (Viale F. Crispi 7, L’Aquila) ———————————————— Matter and topology: an overview Gian Michele Graf (ETH Zurich) 3/6 (Tue) 14:15-15:45 5/6 (Thu) 14:15-15:45 6/6 (Fri) 09:00-10:45 Topological insulators are materials that are conducting at their edge, though not in the bulk. Their essential physical properties are encoded by an index. After reviewing the historical origins, and the Quantum Hall effect in particular, the appropriate indices will be discussed (Chern numbers, index of a pair of projections), as well as bulk-edge correspondence. Thereafter symmetry protected topological insulators will be addressed. The focus will be on symmetries like time-reversal and particle-hole conjugation and, correspondingly, on the Quantum Spin Hall effect and Majorana zero modes in superconductors, in physical dimensions d=2 and 1, respectively. More broadly, the Kitaev table describes the kind of indices that occur in relation to many more symmetries, in any dimension d, and its derivation will be treated. Special topics beyond the above framework, such as time-dependent systems (Floquet or quantum pumps) or classical systems (hydrodynamics) may occur too, as time permits. ———————————————— SMAQ Seminar: Adiabatic charge pumps and Galilei covariance Gian Michele Graf (ETH Zurich) 6/6 (Fri) 14:00-15:30 The Thouless theory of quantum pumps establishes quantized transport per cycle and determines the necessary conditions. When the description is shifted to a moving reference frame, as suggested by recent experiments on ultracold gases, transported and residing charges mix. That transformation is encoded in Galilean space and time, but underlying it is one of vector bundles that may be described in a number of ways, that may or may not rely on Bloch theory. In one of them, the transformation mixes strong and weak indices of a bundle on a 2-torus; in another one, a 3-torus is at center stage; in yet another one, and somewhat informal way, the transformation is related to a paradox that astonished seafarers of centuries past. Joint work with T. Esslinger and F. Santi. ———————————————— Branching Brownian motion and knowledge diffusion: from Fisher-KPP to MFG Lenya Ryzhik (Stanford) 10/6 (Tue) 16:15-17:45 11/6 (Wed) 10:45-12:15 & 16:15-17:45 12/6 (Thu) 16:15-17:45 We will first discuss the general connection, via the voting models, between the branching Brownian motion (BBM) and the Fisher-KPP and other semilinear parabolic equations. This connection, together with the long time asymptotics of the solutions, allows, in particular, to deduce some fine properties of BBM, such as the law of large numbers and fluctuations of the limiting process near the maximum of BBM. In the second half of the lectures, we will discuss some knowledge diffusion models that arise in macroeconomics and lead to mean-field game type of problems that are also related to non-local Fisher-KPP equations. ———————————————— With our best wishes, Lu Xu Assistant Professor (RTDb) Gran Sasso Science Institute

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Seminario di Hakima Bessaih - Pavia, 3 giugno 2025 ore 14
by Benedetta Ferrario 27 May '25

27 May '25

Martedì *3 giugno alle ore 14* presso il Dipartimento di Scienze Economiche e Aziendali (aula E, piano terra) dell'Università di Pavia, la prof.ssa Hakima Bessaih terrà un seminario: *titolo*: Dynamical systems with noisy data *abstract*: Reconstructing the state of a dynamical system from noisy observations is particularly challenging when the initial conditions are unknown. This talk focuses on synchronization-based and feedback control methods for data assimilation, which dynamically align model trajectories with observed data. Techniques such as nudging, observer-based schemes, and coupling strategies will be discussed, highlighting how they correct for uncertainty and stabilize the system in real time. Applications include chaotic systems and models governed by stochastic dynamics. Tutti gli interessati sono invitati a partecipare. Un cordiale saluto Benedetta Ferrario

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PhD in Mathematics at University of Torino, Italy
by Riccardo Maffucci 26 May '25

26 May '25

Dear Colleagues, I would like to draw your attention to the open call for positions in the PhD program in Mathematics at the University of Torino, Italy. See here<https://www.dottorato.unito.it/do/home.pl/View?doc=Bando_XLI_ciclo.html> for the call and information on how to apply. Deadline: June 15th. There are 10 positions with scholarship, with one reserved for candidates with a foreign master degree. See here<https://www.dottorato.unito.it/do/documenti.pl/ShowFile?_id=strh;field=file…> for a description of the 10 positions, some of which involve a joint supervision with a foreign partner. See also this link<https://www.mathphd.unito.it/do/home.pl/View?doc=supervisors.html> for a list of research topics with corresponding possible supervisors. I would like to draw your attention specifically to the possibility of a PhD on Planar Graphs and Polyhedra, co-supervised by me in Torino, and with frequent visits to the University of Warwick, UK, working with Prof. Agelos Georgakopoulos. There is also the possibility of a PhD supervised by me on topics relating to graph theory, number theory, geometry of numbers, discrete mathematics, probability. Candidates are very welcome to contact me for further details if they are interested. The interviews for the selection of candidates will take place in July, and can be carried out online. The outcome of the selection will be published at the beginning of August; admitted candidates have 7 days to accept the position. Candidates can obtain their Master degree by October 31st, 2025 (and not by the expiry date of the call). The starting date of the PhD program is November 1st, 2025. Please forward this email to anyone who might be interested. Best regards, Riccardo Maffucci University of Torino

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Upcoming PhD Course on Tail Dependence Risk at Roma Tre University
by Francesco Cesarone 26 May '25

26 May '25

Dear All, I am pleased to announce a new series of PhD courses organized by the Research Group on Quantitative Finance at the Department of Business Studies, Roma Tre University. Below are the details for the first course in this series: * Tail Dependence Risk Davide Lauria - Researcher in Financial Mathematics, Applied Probability, and Stochastic Programming at the University of Bergamo, Department of Managerial Science. Date: Tuesday, 27 May, h: 11:00 - 14:00; Wednesday, 28 May, h: 11:00 - 14:00; Thursday, 29 May, h: 11:00-13:00; Thursday, 29 May, h: 15:00-17:00. Participants can attend the seminars either in person at the Computer Lab (small room) located on the ground floor of the Department of Business Studies, Roma Tre University (Via Silvio D'Amico, 77, 00145 Rome, Italy), or online. For more information, please refer to the following web page<https://www.francescocesarone.com/phd/phd-courses>. Best regards, Francesco Cesarone * F Cesarone, M Corradini, L Lampariello (2024), Matematica generale, Edizioni Giappichelli, ISBN 9791221107746<https://www.giappichelli.it/matematica-generale-9791221107746> * F Cesarone, M Corradini, L Lampariello (2024), Esercitazioni di matematica generale, Edizioni Giappichelli, ISBN 9791221107753<https://www.giappichelli.it/esercitazioni-di-matematica-generale-9791221107…> * F Cesarone (2020), Computational Finance. MATLAB oriented modeling, Routledge-Giappichelli Studies in Business and Management, ISBN 978-0-367-49303-5<https://www.giappichelli.it/computational-finance-9788892132504> For more info: https://www.francescocesarone.com/books -- Francesco Cesarone - Ph.D. Full Professor Department of Business Studies Roma Tre University Via Silvio D'Amico, 77 00145 - Roma, Italy phone: +39 06 57335744 Skype: francesco.cesarone email: francesco.cesarone(a)uniroma3.it<mailto:francesco.cesarone@uniroma3.it> office no 16, 5th floor WWW: https://www.francescocesarone.com<https://www.francescocesarone.com/>/<https://www.francescocesarone.com/>

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Seminario Hakima Bessaih - Politecnico di Milano - 30 Maggio 2025
by Luca Scarpa 26 May '25

26 May '25

Si segnala il seguente seminario a tutti gli interessati. Venerdì 30 Maggio 2025, ore 11:00. Aula Seminari III Piano, Dipartimento di Matematica, Politecnico di Milano. Speaker: Hakima Bessaih, Florida International University. Title: Synchronization in Stochastic Systems: Models and Applications Abstract: Synchronization phenomena describe the long-time behavior of systems composed of interacting particles or agents that eventually reach a common state. In this talk, we will present several stochastic models and investigate their synchronization properties under both additive and multiplicative noise. We will also explore an application to networked systems, modeled by stochastic reaction-diffusion equations on a graph. Link Zoom: https://polimi-it.zoom.us/j/97744268266?pwd=JinYaL7ZNixmf5IcNgWHkNFVwFhfXI.1 Link Seminario Polimi: https://www.mate.polimi.it/eventi/?id=2596#single ----- 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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Errata corrige: The Mathematics of Subjective Probability - MSP2025
by Pietro Rigo 26 May '25

26 May '25

Chiedo scusa a tutti: a causa di un mio errore materiale, la versione precedente di questo annuncio conteneva alcune inesattezze Quella che trovate sotto e' la versione giusta Pietro ................................................ Dear all, we are happy to announce the forthcoming fourth edition of the conference: The Mathematics of Subjective Probability - MSP2025 that will be hosted by the University of Milano-Bicocca on the days 8, 9 and 10 September 2025. The workshop, jointly organized by the three Departments of Economics, Statistics and Mathematics of Milano-Bicocca, is divided into three thematic areas, one for each day: Theory of decisions, Bayesian nonparametrics and Stochastic analysis. Keynote speakers will be: Florian BRANDL Simone CERREIA-VIOGLIO Eugenio REGAZZINI Antonio LIJOI Iliya CHEVIREV Giuseppe CANIZZARO Participation is free but registration is mandatory. Further details are available at the conference website: https://msp.campus.unimib.it/program [https://lh5.googleusercontent.com/R_QoYr9mkASLV83FNd82KweMNaImVE_2UQkb9NLOu…]<https://msp.campus.unimib.it/program> MSP 2025 - Program<https://msp.campus.unimib.it/program> final program . Monday, September 8 th 9:30 - 10:00, Registration; 10:00 - 10:15, Welcome address, prof. Leo Ferraris, (Head of the Department of Economics); 10:15 - 11:15, Florian Brandl (University of Bonn), (keynote speaker): TBA; 11:30 - 12:30, Simone Cerreia-Vioglio (Università "L. msp.campus.unimib.it . We look forward to seeing you in Milan. ------------------------------------- The Organizing Committee Stergios Athanasoglou Francesco Caravenna Gianluca Cassese Andrea Ongaro Pietro Rigo Gianmario Tessitore Barbara Vantaggi -------------------------------------

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OWABI@BioInference2025 - 29th May 10am UK time
by Massimiliano Tamborrino 26 May '25

26 May '25

Dear all, the next OWABI www.warwick.ac.uk/owabi<http://www.warwick.ac.uk/owabi> seminar is quickly approaching, with two talks live from BioInference 2025 (https://bioinference.github.io/2025/). The seminars will be on Thursday the 29th May, at 10am UK time (note the different time with respect to previous seminars), given by * Andrew Golightly (Durham University), Accelerating Bayesian inference for stochastic epidemic models using incidence data * Henrik Häggström (Chalmers University), Simulation-based inference for stochastic nonlinear mixed-effects models with applications in systems biology with abstracts reported below. The talks will be streamed on the OWABI MS Team Channel<https://teams.microsoft.com/l/team/19%3AdhZ_4e_XLNJzCXPAMzTvT6BZ5KShEETkd_w…> <https://teams.microsoft.com/l/team/19%3AdhZ_4e_XLNJzCXPAMzTvT6BZ5KShEETkd_w…> , at the link https://teams.microsoft.com/l/meetup-join/19%3adhZ_4e_XLNJzCXPAMzTvT6BZ5KSh… Meeting ID: 323 917 219 730 3 Passcode: Fk9JG3eB 1st OWABI Talk: 10-10.30am UK time Speaker: Andrew Golightly<https://www.durham.ac.uk/staff/andrew-golightly/> (Durham University) Title: Accelerating Bayesian inference for stochastic epidemic models using incidence data Abstract: This work considers the case of performing Bayesian inference for stochastic epidemic compartment models, using incomplete time course data consisting of incidence counts that are either the number of new infections or removals in time intervals of fixed length. The most natural Markov jump process representation of the model is eschewed for reasons of computational efficiency, and replaced by a stochastic differential equation representation. This is further approximated to give a tractable Gaussian process, that is, the linear noise approximation (LNA). Unless the observation model linking the LNA to data is both linear and Gaussian, the observed data likelihood remains intractable. Unlike previous approaches that use the LNA in this setting, two approaches for marginalising over the latent process are considered: a correlated pseudo-marginal method and analytic marginalisation via a Gaussian approximation of the noise model. These approaches are compared using synthetic data with the best performing method applied to real data consisting of removal incidence of Oak Processionary moth nests in Richmond Park, London. 2nd Seminar: 10.30-11am UK time Speaker: Henrik Häggström<https://research.chalmers.se/en/person/henhagg> (Chalmers University) Title: Simulation-based inference for stochastic nonlinear mixed-effects models with applications in systems biology Abstract: We propose a novel methodology for Bayesian inference in hierarchical mixed-effects models. By building on our work [1], we construct a simulation-based inference (SBI) framework that is highly scalable, where amortized approximations to the likelihood and the parameters posterior are first obtained, and these are rapidly refined for each individual dataset, to ultimately approximate the parameters posterior across many individuals. Unlike the current state-of-art SBI methods, which use neural networks, our approximations are expressed via Gaussian mixture models, leading to easily trainable, parsimonious yet expressive surrogate models of both the likelihood function and the posterior distribution. The methodology is exemplified via stochastic differential equation mixed-effects models to describe translation kinetics after mRNA transfection, however the methodology is general and can accommodate other types of stochastic and deterministic models. We compare our approximate inference with exact pseudomarginal inference and show that our methodology is fast and competitive. We are looking forward to seeing you at the next OWABI seminar(s), best, Massimiliano on the behalf of the OWABI Organisers ------ Dr. Massimiliano Tamborrino Reader (Associate Professor) and WIHEA Fellow Department of Statistics University of Warwick https://warwick.ac.uk/tamborrino

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The Mathematics of Subjective Probability - MSP2025
by Pietro Rigo 25 May '25

25 May '25

Dear all, we are happy to announce the forthcoming fourth edition of the conference: The Mathematics of Subjective Probability - MSP2025 that will be hosted by the University of Milano-Bicocca on the days 8, 9 and 10 September 2025. The workshop, jointly organized by the three Departments of Economics, Statistics and Mathematics of Milano-Bicocca, is divided into three thematic areas, one for each day: Theory of decisions, Bayesian nonparametrics and Stochastic analysis. Keynote speakers will be: Florian BRANDL Simone CERREIA-VIOGLIO Eugenio REGAZZINI Antonio LIJOI Iliya CHEVIREV Giuseppe CANIZZARO Participation is free but registration is mandatory. Further details are available at the conference website: https://msp.campus.unimib.it/program. We look forward to seeing you in Milan. ------------------------------------- The Organizing Committee Stergios Athanasoglou Francesco Caravenna Gianluca Cassese Andrea Ongaro Pietro Rigo Barbara Vantaggi -------------------------------------

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PhD positions in Complex Networks at IMT Lucca
by Anna Gallo 23 May '25

23 May '25

Dear all, I'm happy to share that applications are now open for the PhD programme in Complex Networks at IMT Lucca! On behalf of Prof. Diego Garlaschelli, Director of the Research Unit Networks, I invite you to check out the details below if you are interested. All the best, Anna Gallo _______________________________________________ Are you a strong candidate interested in a PhD trajectory in complex systems, complex networks, entropy and information? There are openings in the NETWORKS Unit <https://networks.imtlucca.it/> at IMT Lucca! Please see the two calls below. Both allow for applications before the MSc degree is obtained, conditionally of obtaining it before the end of October 2025. - PhD in Systems Science <https://sys.imtlucca.it/> | deadline May 30, 2025 | IMT School of Advanced Studies Lucca, Italy (here, the relevant track is "Complex Systems and Networks") - PhD in Artificial Intelligence for Society <https://phd-ai-society.di.unipi.it/applications/> | planned to open on 18 June 2025 | University of Pisa, Italy (here, in the application you can express preference for the PhD fellowship sponsored by IMT School Lucca). -- Diego Garlaschelli Professor of Theoretical Physics NETWORKS Unit <https://networks.imtlucca.it/> (director) Rector's Delegate for Internationalization IMT School for Advanced Studies Piazza S. Francesco 19, 55100 Lucca (Italy) Econophysics and Network Theory group <https://www.universiteitleiden.nl/en/science/physics/biological-matter/dieg…> (PI) Lorentz Institute for Theoretical Physics, University of Leiden Niels Bohrweg 2, 2333 CA Leiden (The Netherlands) Maximum-Entropy Networks <https://link.springer.com/book/10.1007%2F978-3-319-69438-2>: Pattern Detection, Network Reconstruction and Graph Combinatorics

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