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Padova Seminars in Probability and Finance - Athanasios Vasileiadis (Université Côte d'Azur)
by alessandra bianchi 18 Jan '23

18 Jan '23

Dear Colleagues, We would like to invite you to the following seminar that will take place on January 27 at 14.30. The seminar will be held in person and online via the Zoom platform. The organizers, Alessandra Bianchi, Giorgia Callegaro, Marco Formentin _____________________________________________________ *Speaker*: Athanasios Vasileiadis (Université Côte d'Azur) *Title*: Solving Stochastic Control and Mean Field Games using Deep Reinforcement Learning *Date and time*: January 27, 2023 at 14.30 *Place*: Room 2BC30 of the Department of Mathematics, University of Padova *Zoom link*: https://unipd.zoom.us/j/83527477275 (meeting ID: 835 2747 7275) available also on the webpage https://www.math.unipd.it/~bianchi/seminari/ *Abstract*: In recent years there have been big breakthroughs in applying machine learning for the solution of control problems primarily solving the curse of dimensionality. In this talk we will lay the foundations of Reinforcement Learning and apply it to stochastic control problems first and then Mean Field Games. On the theoretical side we will see some guarantees for the convergence of the approximations, as well as how to use noise to learn the Nash Equilibria of the MFG problem. On the practical side we will use Artificial Neural Networks to look for the optimal controls in feedback form and discuss results in higher dimensions. -- Alessandra Bianchi Dip. di Matematica Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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(PMS)^2 talks: E. Luongo and F. Grotto [Jan 23]
by Maurizia Rossi 18 Jan '23

18 Jan '23

Dear colleagues, We are happy to announce the following *hybrid - that is, in person with online streaming - *talks: Speaker: *Eliseo Luongo* (SNS Pisa) *Title:* A stochastic particle approximation approach of the 2D Navier-Stokes equations with vorticity generation. (See Abstract below.) Speaker: *Francesco Grotto *(Univ. di Pisa) *Title:* Area Excursions and nodal Leray measures for Random Waves on hyperbolic space. (See Abstract below.) Date and Time: *Monday January 23, 14:30-16:30 (Rome time zone)* Place: *Aula 3014,* *Dip. di Matematica e Applicazioni, Univ. di Milano-Bicocca*, via R. Cozzi 55, Milano *Webex link:https://unimib.webex.com/unimib-it/j.php?MTID=m4a814f4cfe7e7a7ace5ef5e… <https://unimib.webex.com/unimib-it/j.php?MTID=m4a814f4cfe7e7a7ace5ef5e4d3f6…>* *Meeting number:* 2743 324 2093 *Password:*YPiMid9rP83 *-* *Abstract (Luongo)*: Particle approximation of 2D Navier-Stokes equations is a relevant problem in fluid dynamics with consequences also in its numerical analysis. The problem is essentially solved in the case of domains without boundary, but it remains mostly open in the case of no-slip boundary conditions, due to the difficulty of understanding and modeling generation of vorticity close to the boundary. The solution of this problem could have a deep impact in our understanding of turbulence. In this talk we present a stochastic particle approximation method which allows us to treat 2D Navier-Stokes equations in the case of prescribed vorticity generation. Our approach is almost completely functional analytic based. Moreover we obtain finer convergence results to the solution of the Navier-Stokes equations compared to propagation of chaos techniques. The talk is based on a joint work with F. Grotto and M. Maurelli. *Abstract (Grotto):* Focusing on the asymptotic behavior of a couple of relevant geometric functionals, we will discuss analogies and differences between random wave models on hyperbolic space and other geometric settings on which the related theory is by now well-established. Based on joint work with Giovanni Peccati. - These talks are part of the *(PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics* organized jointly by the universities Milano-Bicocca, Pavia, Milano-Politecnico. Participation is free and welcome! Best regards The organizers (Carlo Orrieri, Maurizia Rossi, Margherita Zanella) -- Maurizia Rossi Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca https://mauriziarossi.wordpress.com

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Fwd: [MatApp-list] Seminari del Centenario UMI a Milano - Bicocca, 26 gennaio 2023
by Gianmario Tessitore - UNIMIB 18 Jan '23

18 Jan '23

---------- Forwarded message --------- Da: Veronica Felli <veronica.felli(a)unimib.it> Date: lun 16 gen 2023 alle ore 08:00 Subject: [MatApp-list] Seminari del Centenario UMI a Milano - Bicocca, 26 gennaio 2023 To: <matapp-dip-groups(a)unimib.it>, <dottormate(a)unipv.it> Gentilissime/i il 26 gennaio 2023 l’Università di Milano-Bicocca ospiterà uno dei “Seminari del Centenario” dell’Unione Matematica Italiana. L’incontro si terrà a partire dalle ore 15 presso Aula Sironi (U4-08) Edificio U4 – Piazza della Scienza 4 Milano Sono previste le due conferenze: - Francesco Caravenna (Università di Milano-Bicocca): Singolarità e Regolarità Aleatorie - Susanna Terracini (Università di Torino): TBA Per dettagli sul programma si rimanda alla locandina allegata e al link https://umi.dm.unibo.it/milano26gennaio23/ Allo stesso link è disponibile il form per l’iscrizione all’evento. Tutti gli interessati sono invitati a partecipare. Veronica Felli -- Gianmario Tessitore Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca

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reminder Postdoc position @ Warwick
by Giuseppe Cannizzaro 17 Jan '23

17 Jan '23

Gentili colleghi, vi ricordo la posizione di postdoc presso l'università Warwick per lavorare con me su argomenti di probabilità, analisi stocastica e meccanica statistica. https://atsv7.wcn.co.uk/search_engine/jobs.cgi?owner=5062452&ownertype=fair… Vi prego di incoraggiare buoni candidati che stanno completando o hanno completato il dottorato a fare domanda. Cari saluti, Giuseppe Cannizzaro ************************************************************** Dear colleagues, I am writing to you to kindly ask you to circulate the Postdoc position that I opened at the University of Warwick. The successful candidate will be working with me on topics related to the UKRI FLF project “Large-scale universal behaviour of Random Interfaces and Stochastic Operators” MR/W008246/. https://atsv7.wcn.co.uk/search_engine/jobs.cgi?owner=5062452&ownertype=fair… Please, encourage strong candidates with a background in any area of probability theory, stochastic analysis or statistical mechanics to apply. Best wishes, Giuseppe Cannizzaro

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Fwd: Phd-student or Postdoc vacancy at Augsburg University and LMU Munich
by alessandra bianchi 16 Jan '23

16 Jan '23

Buongiorno, Ricevo ed inoltro volentieri il seguente annuncio da parte di Sabine Jansen e Markus Heydenreich. Saluti, Alessandra Bianchi ------------------------------------------------------------------------------------- Dear colleagues, We are looking for a talented researcher to work on a project on *Continuum Particle Systems* at Augsburg University and LMU Munich. The project focuses on the decay of correlations of continuum particle systems and combines techniques from stochastic geometry and statistical mechanics. This is a temporary position that can be filled by a PhD student or postdoc (Salary scale TV-L E13, full- or part-time, fixed term) to be started on 01 May 2023 or later. We are looking for candidates with excellent background in probability theory and statistical mechanics who obtained an MSc degree in Mathematics. The project is part of the newly established SFB/CRC “Mathematics of Many-Body Quantum Systems and Their Collective Phenomena“ (Munich/Tuebingen). Please contact Prof. Sabine Jansen (jansen(a)math.lmu.de) or Prof. Markus Heydenreich (m.heydenreich(a)lmu.de) for further information about the project. Interested candidates are invited to send letter of motivation, curriculum vitae as well as name and contact details of two academic references to m.heydenreich(a)lmu.de. Review of application begins on 01 February 2023 and shall continue until the position is filled. Best wishes, Sabine Jansen and Markus Heydenreich -- Alessandra Bianchi Dip. di Matematica Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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Seminar in Statistics - ANGELIKA ROHDE
by Pierpaolo De Blasi 16 Jan '23

16 Jan '23

SEMINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.carloalberto.org/events/category/seminars/seminars-in-statistic…> Venerdi 20 Gennaio 2023, alle ore 12.00, presso il Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terrà il seguente seminario: ------------------------------------------------ Speaker: *Angelika Rohde* (University of Freiburg) Title: *Estimating functionals under local differential privacy* Abstract: We study the problem of estimating a functional $\theta(\mathbb{P})$ of an unknown probability distribution $\mathbb{P} \in\mathcal{P}$ in which the original iid sample $X_1,\dots, X_n$ is kept private even from the statistician via an $\alpha$-local differential privacy constraint. Let $\omega_{TV}$ denote the modulus of continuity of the functional $\theta$ over $\mathcal{P}$ with respect to total variation distance. For a large class of loss functions $l$ and a fixed privacy level $\alpha$, we prove that the privatized minimax risk is equivalent to $l(\omega_{TV}(n^{-1/2}))$ to within constants, under regularity conditions that are satisfied, in particular, if $\theta$ is linear and $\mathcal{P}$ is convex. Our results complement the theory developed by Donoho and Liu (1991 Ann. Statist. 19 633–667) with the nowadays highly relevant case of privatized data. Somewhat surprisingly, the difficulty of the estimation problem in the private case is characterized by $\omega_{TV}$, whereas, it is characterized by the Hellinger modulus of continuity if the original data $X_1,\dots, X_n$ are available. We also find that for locally private estimation of linear functionals over a convex model a simple sample mean estimator, based on independently and binary privatized observations, always achieves the minimax rate. In particular, over the larger class of so-called sequentially interactive privacy mechanisms, a non-interactive procedure attains this rate. Next, we turn to one of the most studied non-linear functionals, the quadratic functional. Here, in contrast, we show that for estimating the integrated square of a density, sequentially interactive privacy mechanisms improve substantially over the best possible non-interactive procedure in terms of minimax rate of estimation. In particular, in the non-interactive scenario we identify an elbow in the minimax rate at $s=3/4$, whereas in the sequentially interactive scenario the elbow is at $s=1/2$. This is markedly different from both, the case of direct observations, where the elbow is well-known to be at $s=1/4$, as well as from the case where Laplace noise is added to the original data, where an elbow at $s=9/4$ is obtained. ------------------------------------------------ Sarà possibile seguire il seminario anche in streaming: Join Zoom Meeting <https://us02web.zoom.us/j/89240989650?pwd=eVZSTUVEWHM2SnhBWXpnL21VU3gvQT09> Il seminario è organizzato dalla "de Castro" Statistics Initiative www.carloalberto.org/stats -- Pierpaolo De Blasi University of Torino & Collegio Carlo Alberto carloalberto.org/pdeblasi <https://sites.google.com/a/carloalberto.org/pdeblasi/>

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Summer school: Deterministic and random features of fluids - EPFL, 2023.7.3-7
by Lucio Galeati 15 Jan '23

15 Jan '23

Dear colleagues, I'm glad to inform you about the following event that we are organizing at EPFL for this July; feel free to advertise it among potentially interested participants at your department. Below you can find a short description and the link to the official website. Participation is free but mandatory; there is (limited) funding for travel and accommodation, for which case the application deadline is March 15th 2023. All the best, Lucio (on behalf of the organising committee) ========= Summer school: Deterministic and random features of fluids Date: Monday, Jul 3, 2023 -- Friday, Jul 7, 2023 Place: EPFL, Lausanne, Switzerland The summer school focuses on the deterministic and random phenomenologies of incompressible fluids. The format consists of two lecture series (6 hours each) by Prof. Jacob Bedrossian and Prof. Thierry Gallay and of several research talks by experts in the field. The lectures address two main themes: chaotic properties of fluid models in the presence of an external random force and stability at high Reynolds number of vortex configurations. The school is intended to introduce early stage researchers (Ph.D. and postdocs) to these subjects. Support for selected young participants will be available. Organizing Commitee: M. Colombo, M. Dolce, L. Galeati, M. Sorella Website@EPFL: https://www.epfl.ch/labs/amcv/amcv/events/summer-school-deterministic-and-r…

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EXECUTIVE 2nd LEVEL MASTER in QUANTUM MACHINE LEARNING
by Marco Corazza 13 Jan '23

13 Jan '23

*EXECUTIVE 2nd LEVEL MASTER inQUANTUM MACHINE LEARNING* Dear All, I inform you that the deadline for the enrollment to the *EXECUTIVE 2nd LEVEL MASTER in QUANTUM MACHINE LEARNING* has been extended to February 1, 2023. For all details, see *https://www.cafoscarichallengeschool.it/en/master/quantum-machine-learning/ <https://www.cafoscarichallengeschool.it/en/master/quantum-machine-learning/>* . Please, I kindly ask you to give the widest circulation to this note. Looking forward to seeing you at our Master, Marco Corazza -- Marco Corazza, Ph.D. Department of Economics - Ca' Foscari University of Venice San Giobbe, Cannaregio 873 - 30121 Venezia, Italy Mobile: (+39) 366 602-9134 Phone: (+39) 041 234-6921 Fax: (+39) 041 234-7444 E-mail: corazza(a)unive.it Editor-in-Chief: Mathematical Methods in Economics and Finance - www.unive.it/m2ef -- <<Determinare [... gli] aspetti della struttura di una ConvNet rispecchia l'arte di far funzionare queste reti complesse per un particolare compito.>> M. Mitchell, "L'intelligenza artificiale. Una guida per esseri umani pensanti", Giulio Einaudi Editore, 2022 [pag. 69]

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Fwd: January 24-25 IRS 2023 Conference Program
by Faggionato, Alessandra 13 Jan '23

13 Jan '23

Buongiorno Inoltro l'annuncio di IRS 2023 con l'orario e titoli dei seminari delle 2 giornate Saluti Alessandra ---------- Forwarded message --------- From: Inhomegenous Random <inter(a)math.cnrs.fr> Date: Mon, 2 Jan 2023 at 16:38 Subject: January 24-25 IRS 2023 Conference Program To: <faggiona(a)mat.uniroma1.it> Dear Colleagues, Here is the program of the conference on: INHOMOGENEOUS RANDOM SYSTEMS Tuesday 24 and Wednesday 25 January 2023 Institut Curie Amphitheatre Curie and Institut Henri Poincare Amphitheatre Hermite 11-13 rue Pierre et Marie Curie, Paris also online Registration is important for organizational purposes: thank you for registering if you haven't done so yet, BEFORE TUESDAY, JANUARY 17, also to receive the connection link. Abstracts are available at: http://irs.math.cnrs.fr Looking forward to meeting you, in Paris or online, Giambattista Giacomin, Christian Maes, Ellen Saada. *You will find in attachment a PDF file of the program with the same informations as below which you may print and post up. -------------------------------------------------------------------- -------------------------------------------------------------------- INHOMOGENEOUS RANDOM SYSTEMS Systemes Aleatoires Inhomogenes January 24-25, 2023 Conference Program Institut Curie Amphitheatre Curie and Institut Henri Poincare Amphitheatre Hermite 11-13 rue Pierre et Marie Curie, Paris also online Tuesday 24 January: ------------------------------------------------------------------- POINT PROCESSES AND STATISTICAL MECHANICS ------------------------------------------------------------------- Moderator: Alessandra Faggionato (Roma) 9.00- 9.10 Opening 9.10-10.00 Alessandra Faggionato (Roma): Random resistor networks on simple point processes and Mott's law. 10.00-10.50 Martin Huesmann (Muenster): Fluctuations of the displacement in the optimal matching problem. 10.50-11.15 Coffee Break 11.15-12.05 Sabine Jansen (Muenchen): Large deviations and distribution of cracks in a chain of atoms at low temperature. 12.05-13.30 Lunch 13.30-13.55 Thierry Bodineau (Bures-sur-Yvette), Giambattista Giacomin (Paris), Dasha Loukianova (Evry): A tribute to Francis Comets 14.00-14.50 Frank den Hollander (Leiden): Metastability for the Widom-Rowlinson model with grains of general shape. 14.50-15.40 Raphael Lachieze-Rey (Paris): Percolation of random fields excursions. 15.40-16.05 Coffee Break 16.05-16.55 Giovanni Peccati (Luxembourg): Functional inequalities on the Poisson space, via stopping sets and two-scale stabilization. 16.55-17.45 Antoine Gloria (Paris & Bruxelles): On Einstein's effective viscosity formula. Wednesday 25 January: ------------------------------------------------------------------- FREE PROBABILITY, BETWEEN MATHS AND PHYSICS ------------------------------------------------------------------- Moderator: Jorge Kurchan (Paris) 9.00- 9.10 Opening 9.10- 9.30 Jorge Kurchan (Paris): Introduction. 9.30-10.20 Roland Speicher (Saarbruecken): Free probability and free cumulants. 10.20-10.45 Coffee Break 10.45-11.35 Frederic Patras (Nice): Algebraic structures underlying free probability. 11.35-12.25 Alice Guionnet (Lyon): Matrix models at low temperature. 12.25-13.45 Lunch 13.45-14.35 Denis Bernard (Paris): The Quantum SSEP and the emergence of free probability in many-body mesoscopic quantum systems. 14.35-15.25 Laura Foini (Saclay): Eigenstate Thermalization Hypothesis and Free Probability. 15.25-15.50 Coffee Break 15.50-16.40 Marc Potters (Paris): Free probabilities in action: the spectral method for phase retrieval. 16.40-17.30 Jean-Philippe Bouchaud (Paris): Covariance stability & eigenvector overlaps : a (free) RMT approach. ------------------------------------------------------------------- Registration: The conference and online participation are free and open to all. To facilitate local organisation and receive your connection link, please register in advance by sending an e-mail before January 17 to "inter(a)math.cnrs.fr" with subject: IRS 2023 and the following informations: Name: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Institution:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Address:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Email:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ on site or online:_ _ _ _ _ _ _ _ _ _ _ _ You may also consult the conference web page at: http://irs.math.cnrs.fr Giambattista Giacomin Christian Maes Mathematiques, LPSM Theoretische Fysica Universite Paris Cite KU Leuven, Belgium Ellen Saada Mathematiques, MAP5 CNRS & Universite Paris Cite Partially supported by CNRS, Universite Paris Cite and KU Leuven. ----------------------------------------------------------------- ----------------------------------------------------------------- -- ************************************************* Prof. Alessandra Faggionato https://www1.mat.uniroma1.it/people/faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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Seminario Paolo Dai Pra
by Enrica Pirozzi 11 Jan '23

11 Jan '23

AVVISO di SEMINARIO Prof. Paolo Dai Pra Università di Verona TITOLO Polarization and Coherence in Mean Field Games Driven by Private and Social Utility Abstract We study a mean field game in continuous time over a finite horizon, T, where the state of each agent is binary and where players base their strategic decisions on two, possibly competing, factors: the willingness to align with the majority (conformism) and the aspiration of sticking with the own type (stubbornness). We also consider a quadratic cost related to the rate at which a change in the state happens: changing opinion may be a costly operation. Depending on the parameters of the model, the game may have more than one Nash equilibrium, even though the corresponding N- player game does not. Moreover, it exhibits a very rich phase diagram, where polarized/unpolarized, coherent/incoherent equilibria may coexist, except for T small, where the equilibrium is always unique. We fully describe such phase diagram in closed form and provide a detailed numerical analysis of the N-player counterpart of the mean field game. Joint work with Marco Tolotti (Venezia) and Elena Sartori (Padova). Il seminario si terrà il giorno 13 Gennaio 2023 ore 11:00 nella Aula F del Dipartimento Matematica e Applicazioni, Università di Napoli FEDERICO II, Complesso di Monte Sant'Angelo, Via Cintia, Napoli. Link a Teams: https://teams.microsoft.com/l/meetup-join/19%3aMQ4RZDBo_0G-K_PHxKtktVYAczOG… -- Enrica Pirozzi Dipartimento di Matematica e Applicazioni Universita' di Napoli FEDERICO II Via Cintia, Monte S.Angelo, 80126, NAPOLI, ITALY Tel. 081 675634 https://www.docenti.unina.it/ENRICA.PIROZZI

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