January 2019 - Random - Mailing list — Dipartimento di Matematica, UniPI

Seminario L Campi presso Univ. Milano 11/2/2018
by Marco Alessandro Fuhrman 28 Jan '19

28 Jan '19

Il professor Luciano Campi della London School of Economics and Political Science (LSE) terrà un seminario dal titolo Mean-field games with absorption il giorno lunedì 11 febbraio 2019 alle ore 14:00 in sala rappresentanza del Dipartimento di Matematica dell'Università di Milano (via Saldini 50, 20133 Milano). Tutti gli interessati sono cordialmente invitati. Cordiali saluti, Marco Fuhrman Abstract. We introduce a simple class of mean field games with absorbing boundary over a finite time horizon. In the corresponding N-player games, the dynamics of players' states follows a system of weakly interacting Ito equations with absorption on first exit from a given set. Once a player leaves the game, her/his contribution is removed from the empirical measure of the system. Players thus interact through a renormalized empirical measure. In the definition of solution to the mean field game, the renormalization appears in form of a conditional law. We also consider the case of a system whose drift can be affected by the fraction of past absorbed players. Under fairly general assumptions, we show that in both cases a solution of the mean field game exists in feedback form and it induces approximate Nash equilibria for the N-player games when N is sufficiently large. This approximation result is established under non-degeneracy of the diffusion coefficient. The degenerate case is more delicate and might lead to counter-examples. The talk is based on joint works with Markus Fischer, Maddalena Ghio and Giulia Livieri.

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Fwd: posto in mat/06
by Francesco Caravenna 25 Jan '19

25 Jan '19

Ricevo e inoltro. > Da: Susanna Terracini <susanna.terracini(a)gmail.com> > Oggetto: I: posto in mat/06 > Data: 24 gennaio 2019 18:06:49 CET > > Inizio messaggio inoltrato: > >> Da: scuccagna(a)units.it <mailto:scuccagna@units.it> >> Data: 24 gennaio 2019 16:57:42 CET >> Oggetto: posto in mat/06 >> >> Cara Susanna, >> >> ti pregherei di fare girare l'informazione relativa ad >> >> un posto di professore di II fascia >> nel settore MAT/06 all'Università di Trieste >> >> https://sid.units.it/albo/viewer?view=files/001534481-untscle-000fff13-27ff… <https://sid.units.it/albo/viewer?view=files/001534481-untscle-000fff13-27ff…> >> >> Il termine per la presentazione delle domande è il 17/02/2019. >> >> Cordialmente, >> >> Scipio Cuccagna >>

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12th Bayesian nonparametrics meeting: Registration and Childcare service
by Fabrizio Leisen 25 Jan '19

25 Jan '19

Dear All, the registration for the 12th Bayesian nonparametrics meeting is now open. You can register at the link: http://www.stats.ox.ac.uk/bnp12/registration.html IMPORTANT: We are considering offering a childcare service for the conference, but would like to make sure there is enough interest in this. If you are potentially interested in this service, we would appreciate if you could let us know by emailing bayesnp12(a)stats.ox.ac.uk before February 4. For more information on the intended crèche service: http://www.stats.ox.ac.uk/bnp12/practical.html Best Wishes, Fabrizio **************************************************************************** The 12th Bayesian nonparametrics (BNP) meeting will be held in Oxford from the 24th to the 28th of June 2019: http://www.stats.ox.ac.uk/bnp12/ The Bayesian nonparametrics conference is a bi-annual international meeting bringing together leading experts and talented young researchers working on applications and theory of nonparametric Bayesian statistics. It is an official section meeting of the Bayesian Nonparametrics section of the International Society for Bayesian Analysis (ISBA). -- Fabrizio Leisen Reader in Statistics Director of the Msc programmes in Statistics School of Mathematics, Statistics and Actuarial Sciences Sibson Building, University of Kent, Canterbury, CT2 7FS https://www.kent.ac.uk/smsas/our-people/profiles/leisen_fabrizio.html http://sites.google.com/site/fabrizioleisen/

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Summer School "Equilibria in Financial Markets: General Equilibrium and Game Theoretic Perspective" - Bielefeld, July 08 - July 12, 2019
by Ferrari, Giorgio 24 Jan '19

24 Jan '19

Dear All, it is a pleasure to announce the Summer School "Equilibria in Financial Markets: General Equilibrium and Game Theoretic Perspective" to be held at Bielefeld University in the week*July 08 - July 12, 2019 * http://www.uni-bielefeld.de/(en)/imw/summerschool19/ organized and supported by the Center for Mathematical Economics (IMW) and the Collaborative Research Centre 1283. During the summer school we aim at discussing the different approaches to "equilibrium" arising in financial markets and games. In particular, we intend to discuss recent advances in general equilibrium theory, stochastic games, backward stochastic differential equations in games and general equilibrium, and mean-field games. These topics will be addressed during the lectures of Luciano Campi (London School of Economics) Saïd Hamadène (Université du Maine) Kasper Larsen (Rutgers School of Arts and Sciences) Gordan Žitković (University of Texas at Austin) Frank Riedel (Bielefeld University) *Deadline for applications is April 30, 2019*, and you can apply through the following link http://www.uni-bielefeld.de/(en)/imw/summerschool19/application/ If you have any questions please do not hesitate to write an email tosfb1283.imw(a)uni-bielefeld.de Best wishes, Giorgio Ferrari

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RTD-B position in Financial mathematics, actuarial sciences or mathematics for economics - Call for interest - Ca' Foscari University of Venice
by Antonella Basso 23 Jan '19

23 Jan '19

RTD-B position in Financial mathematics, actuarial sciences or mathematics for economics University of Venice, Ca' Foscari <https://inomics.com/institution/university-of-venice-ca-foscari-1132315> The Department of Economics at the Ca’ Foscari University of Venice (DEC) invites expressions of interest for an RTD-B position (assistant professor with an associate professor tenure track) in *Financial mathematics and actuarial sciences*; expressions of interest in *Mathematics for economics *can also be considered. Our Department is devoted to promoting high quality research, seminars and conference activities, with the aim of contributing to the national and international policy debate. QS ranks our Department as top 250 worldwide, Shanghai Ranking as top 300, the most recent Italian National Research Assessment ranked us as fifth economics department in Italy. The Department has been recently financed by the Italian Ministry of Education, University and Research under the program “Departments of Excellence” for the 2018/2022 period. More information about the DEC can be found at _http://www.unive.it/pag/28365/. <http://www.unive.it/pag/28365/>_ Applicants should have an established track record of publications in top international journals and evidence of recognition in the international academic community, preferably including grant application and project management. A strong interest in high quality teaching is also expected. Applications from scholars working abroad are welcome and treated under a favorable tax waiver scheme. *Application Instructions* Applications should be received by March 15, 2019. They should include a CV, and should be sent to *_recruiting.dec(a)unive.it <mailto:recruiting.dec@unive.it>_**.* There are no restrictions regarding the nationality of the applicants. DEC is an equal opportunity employer. Please note that this is a call for interest, not a job vacancy announcement. The Department will advertise job vacancies later in the year. Antonella Basso -- Antonella Basso Prorettore alla Programmazione e Valutazione - Prorector at Planning and Valuation Dipartimento di Economia Università Ca' Foscari Venezia Fondamenta S. Giobbe - Cannaregio 873 30121 Venezia - Italy Tel. +39-041-2346914 - Fax +39-041-2347444 E-mail address: basso(a)unive.it Web page: http://www.unive.it/data/persone/5591751

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Seminario di Probabilita` a Roma1
by Faggionato, Alessandra 23 Jan '19

23 Jan '19

Tuesday 29.01.2019 at 2 p.m. (sharp) Aula di Consiglio, Department of Mathematics, University La Sapienza Speaker: Andrey Piatnitski (Arctic University of Norway, Russian Academy of Sciences) Title: Stochastic homogenization of zero order convolution type operators. Abstract. The talk will focus on homogenization problem for a family of zero order non-local convolution type operators that satisfy proper moment and ellipticity conditions. Under the assumptions that the coefficients of these operators are statistically homogeneous and ergodic we show that the family converges to a second order elliptic differential operator with constant coefficients. -- Thanks Best Alessandra ************************************************* Prof. Alessandra Faggionato http://www1.mat.uniroma1.it/~faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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2nd Leeds Conference on "Stochastic Control and Games Under Ambiguity"
by Tiziano De Angelis 22 Jan '19

22 Jan '19

Dear All, We are pleased to announce the second Leeds Conference on "*Stochastic Control and Games Under Ambiguity*" which will be held in the School of Mathematics at the University of Leeds on 8-9 April 2019. https://conferences.leeds.ac.uk/ambiguity2019/ A full list of *invited speakers* is available at https://conferences.leeds.ac.uk/ambiguity2019/participants/ *Contributed talks and posters:* We now accept submissions for contributed talks and a poster session. If you are interested in presenting your work please send us title and abstract and specify whether it is for a poster or a talk. You can send an email to t.deangelis[at]leeds.ac.uk (Tiziano) or j.palczewski[at]leeds.ac.uk (Jan) The deadline for submission of a contributions is 19 February 2019 and we will let you know if your contribution is accepted on 22 February at the latest. *Registration:* There is a registration fee of £80 which will cover catering costs for lunch and coffee breaks for both days, and a small buffet dinner on the first day of the conference (the dinner will be held in the School of Mathematics). Online registration will open before 15 February and will be available at the link below https://conferences.leeds.ac.uk/ambiguity2019/registration/ The *deadline for registration* is 17 March 2019. *Support for PhD students:* We have some funds available to support attendance by PhD students, please enquire with the organisers (Jan and Tiziano) about this opportunity. We hope to see many of you in Leeds. If you have any queries please do not hesitate to get in touch. Best wishes, Jan and Tiziano

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Seminario GIANNI PAGNINI @ UniTo
by Federico Polito 21 Jan '19

21 Jan '19

********************************************************************* SEMINARI DI PROBABILITA' E STATISTICA MATEMATICA DIPARTIMENTO DI MATEMATICA "G. PEANO" UNIVERSITA' DEGLI STUDI DI TORINO ********************************************************************* Giovedì 7 Febbraio 2019 alle ore 15:00 in Aula S presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, Il Prof. *Gianni Pagnini* (BCAM – Basque Center for Applied Mathematics, Bilbao, Spain) terrà un seminario dal titolo *Convergence of linear superposition of Langevin-driven Brownian particles **to the fractional Brownian motion* Abstract: A heterogeneous ensemble of Brownian particles governed by the Langevin equation is considered. The heterogeneity of the ensemble is characterised by a population of friction coefficients. When the frequency histogram of the friction coefficients decreases with a proper power-law, the linear superposition of these Brownian trajectories converges to the fractional Brownian motion. This construction of the fractional Brownian motion provides a dynamical framework that allows for physical perspectives. In this respect, this results is first connected with the so-called generalized gray Brownian motion and later the application for modelling anomalous diffusion in biological systems is discussed. The first part of the seminar is based on a research in collaboration with Mirko D'Ovidio whose results are still work in progress, and the second part is based on: M. D'Ovidio, S. Vitali, V. Sposini, O. Sliusarenko, P. Paradisi, G. Castellani, G. Pagnini, Centre-of-mass like superposition of Ornstein-Uhlenbeck processes: A pathway to non-autonomous stochastic differential equations and to fractional diffusion. Fract. Calc. Appl. Anal. 21, 1420-1435 (2018), arxiv:1806.11351 D. Molina-García, T. Minh Pham , P. Paradisi, C. Manzo, G. Pagnini, Fractional kinetics emerging from ergodicity breaking in random media. Phys. Rev. E. 94, 052147 (2016) Tutti gli interessati sono invitati a partecipare. -- Federico Polito Department of Mathematics University of Torino Via Carlo Alberto, 10 10123, Torino, Italy Email: federico.polito(a)unito.it Tel: +39 011 6702862 Web: www.federicopolito.it

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Seminario di Giovanni Luca Torrisi a Bologna
by Alberto Lanconelli 21 Jan '19

21 Jan '19

Statistics Seminars 2019 Mercoledì 6 febbraio ore 14.30 Aula seminari - Dipartimento di Scienze Statistiche, I piano “The Clark-Ocone formula and the Poincare' inequality for point processes” Dr. Giovanni Luca Torrisi, CNR-Istituto per le Applicazioni del Calcolo “M. Picone” (Roma) Abstract: "Clark-Ocone formulas are powerful results in stochastic analysis with a variety of applications. In the talk we provide the Clark-Ocone formula for square-integrable functionals of point processes with stochastic intensity. Then we present two applications of the formula: the Poincare' inequality and a concentration bound for those functionals. Our results generalize the corresponding ones on the Poisson space. The talk is based on joint works with Ian Flint and Nicolas Privault (NTU, Singapore)." Tutti gli interessati sono invitati a partecipare Alberto Lanconelli Dipartimento di Scienze Statistiche "Paolo Fortunati" Alma Mater Studiorum - Università di Bologna

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Workshop "The Geometry of Random Fields" Tor Vergata
by Domenico Marinucci 18 Jan '19

18 Jan '19

Cari Colleghi Venerdì 25 gennaio si terrà presso il Dipartimento di Matematica dell'Università di Roma Tor Vergata (Aula D'Antoni) il mini-workshop "The Geometry of Random Fields"; il programma è il seguente: 9.30-10.15 Dmitry Belyaev (Oxford University) Geometry of smooth Gaussian fields and percolation Abstract: Gaussian fields and their level sets are of significant mathematical interest, but they also appear in many other areas of science: oceanography, cosmology and engineering, just to name a few. In this talk I will give an gently introduction to the geometric theory of smooth Gaussian fields, will discuss conjectures about their connection with percolation models and will talk about recent progress in this area. 10.15-11.00 Igor Wigman (King's College London) Points on nodal lines with given direction Abstract: We study of the directional distribution function of nodal lines for eigenfunctions of the Laplacian on a planar domain. This quantity counts the number of points where the normal to the nodal line points in a given direction. We give upper bounds for the flat torus, and compute the expected number for arithmetic random waves. 11.00-11.30 Coffee Break 11.30-12.15 Anne Estrade (Université Paris Descartes) On Berry's dislocation lines in 3D framework Abstract: We study the length of dislocation lines that are given as nodal lines of a complex Gaussian random wave indexed by $\R^3$. We consider random waves that are eigenfunction of the 3D Euclidean Laplacian, isotropically distributed or not. We are particularly interested in the expectation and the variance of the length and their behavior as the associated eigenvalue goes to infinity. We compare the results with the similar situation in 2D that has been extensively studied since Berry's paper in 2002. This is a work in progress with Federico Dalmao and Jose Leon (Universidad de la Republica, Uruguay). 12.15- 13.00 Maurizia Rossi (Università di Pisa) Title: Nodal lengths of random spherical harmonics. Abstract: Random spherical harmonics are Gaussian eigenfunctions of the spherical Laplacian; in this talk we study the geometry of their excursion sets, in particular the high-energy behavior of their boundary length. For the nodal case we show that the length is asymptotically equivalent, in the L^2-sense, to the sample trispectrum, obtaining as a by-product a quantitative Central Limit Theorem for it. The length at non-zero level, being asymptotically equivalent to the (random) norm of the eigenfunction, is proved to be Gaussian and independent of the nodal length in the high-energy limit. Removing the effect of the eigenfunctions norm (which play no role in the nodal case indeed) we prove that the partial correlation between nodal and boundary lengths is asymptotically one. This talk is based on joint works with D. Marinucci and I. Wigman. Grazie per l'attenzione, Domenico Marinucci -- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Domenico Marinucci Dipartimento di Matematica Università di Roma Tor Vergata https://www.mat.uniroma2.it/~marinucc/ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

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