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Seminario Prof. Claudio Macci
by malongob＠unina.it 30 Nov '19

30 Nov '19

Il Prof. Claudio MACCI dell'Università di Roma Tor Vergata mercoledì 4 dicembre 2019 alle ore 16 nell'Aula E al III livello del Dipartimento di Matematica e Applicazioni dell'Università degli Studi di Napoli Federico II terrà un seminario dal titolo: Large deviations for risk measures in finite mixture models ABSTRACT Due to their heterogeneity, insurance risks can be properly described as a mixture of different fixed models, where the weights assigned to each model may be estimated empirically from a sample of available data. If a risk measure is evaluated on the estimated mixture instead of the (unknown) true one, then it is important to investigate the committed error. In this paper we study the asymptotic behaviour of estimated risk measures, as the data sample size tends to infinity, in the fashion of large deviations. We obtain large deviation results by applying the contraction principle, and the rate functions are given by a suitable variational formula; explicit expressions are available for mixtures of two models. Finally, our results are applied to the most common risk measures, namely the quantiles, the expected shortfall and the shortfall risk measure. Joint work with Valeria Bignozzi and Lea Petrella. La proponente Maria Longobardi

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Avviso seminario_Alessandra Faggionato_Giovedì 5 dicembre_ore 16
by Carlo Orrieri 28 Nov '19

28 Nov '19

Avviso di Seminario, università di Trento Stochastic homogenization in amorphous media and applications to interacting particle systems and random resistor networks Giovedì 5 dicembre 2019 Luogo: Polo Ferrari 1, via Sommarive, 5 - Povo (TN) - Aula A221 Ore: 16:00 Relatore: Alessandra Faggionato (Università La Sapienza, Roma) Abstract: We consider random walks on marked simple point processes with symmetric jump rates and unbounded jump range. Examples are given by simple random walks on Delaunay triangulations or Mott variable range hopping in doped semiconductors. We present homogenization results for the associated Markov generators. As a first application, we obtain the hydrodynamic limit of the exclusion process given by multiple random walks as above, with hard–core interaction. As a second application, we derive a limit theorem for the effective conductivity of some classes of random resistor networks. This result together with a percolation-type analysis allows to derive the low temperature scaling behavior of conductivity in some classes of strongly disordered media.

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premi banditi dalla Società Italiana di Statistica
by Antonio DI CRESCENZO 27 Nov '19

27 Nov '19

Sono disponibili sul sito della SIS bandi e regolamenti per i seguenti premi: – migliori tesi di dottorato di ricerca; – migliore tesi di Laurea Magistrale in Statistica Matematica (in ricordo del Prof. Oliviero Lessi); – Premio SIS 2019-2020 per la Didattica della Statistica. Maggiori informazioni sono accessibili agli indirizzi seguenti: http://www.sis-statistica.it/ita/9933/Premio%20per%20le%20migliori%20tesi%2… http://www.sis-statistica.it/ita/9960/Premio%20per%20la%20migliore%20tesi%2… http://www.sis-statistica.it/ita/9920/Premio%20per%20la%20Didattica%20della…

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Mini corso: ASYMPTOTICS FOR POSTERIOR BAYESIAN INFERENCE
by Matteo Ruggiero 27 Nov '19

27 Nov '19

Cari colleghi, nell’ambito del programma di Visiting Professors per la Laurea Magistrale in Stochastics and Data Science dell’Università di Torino, con piacere annunciamo il seguente mini corso: ---------------------------------------------- Botond SZABO (Leiden University) ASYMPTOTICS FOR POSTERIOR BAYESIAN INFERENCE ---------------------------------------------- Il corso avrà luogo in Corso Unione Sovietica 218/bis, 10134, Torino, secondo il seguente calendario: Dec 10: 14.00-16.00, Room 30 Dec 11: 14.00-16.00, Room 30 Dec 12: 11.15-13-15, Room 11 Dec 12: 14.00-16.00, Room 11 Il corso è rivolto agli studenti del secondo anno della Laurea Magistrale, ma la partecipazione è aperta a tutti gli interessati. Il programma completo di Visiting Professors, consultabile alla pagina https://www.master-sds.unito.it/go/visiting è supportato dalla Fondazione CRT e dalla “de Castro” Statistics Initiative (www.carloalberto.org/stats) del Collegio Carlo Alberto. Cordiali saluti, Matteo Ruggiero --- Matteo Ruggiero University of Torino and Collegio Carlo Alberto www.matteoruggiero.it

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PostDoc position in Graz
by Daniela Bertacchi 26 Nov '19

26 Nov '19

Open Assistant position (PostDoc) for 2 1/2 years Graz University of Technology, Austria Institute of Discrete Mathematics Working Groups Structure Theory and Stochastics & Noncommutative Structures (Wolfgang Woess & Franz Lehner) Scheduled to start on March 1, 2020. Requirements: PhD in Mathematics or Technical Mathematics, awarded before the beginning of the engagement. Desired qualifications: scientific interest in the fields of Stochastic Processes (random walks) and their analytic counterparts, Graph Theory, Geometric Group Theory and Noncommutative Probability, possibly combining those topics. Readiness to collaborate in research projects in these areas. Workload 40 hours/week. Teaching duties of 4 hours per week per semester, in particular for Mathematics in the Engineering sciences, in German (!). For details + how to apply, see https://www.math.tugraz.at/~woess/position Wolfgang Woess Institut fuer Diskrete Mathematik, Technische Universitaet Graz, Steyrergasse 30, A-8010 Graz, Austria email: woess(a)TUGraz.at http://www.math.TUGraz.at/~woess <http://www.math.tugraz.at/~woess>

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concorso RTD-B MAT 06 all'Aquila
by davide gabrielli 25 Nov '19

25 Nov '19

Segnalo il bando di ricercatore a tempo determinato di tipo B nel settore scientifico disciplinare MAT/06 Probabilità e statistica matematica presso il Dipartimento di ingegneria e scienze dell'informazione e matematica dell'Università dell'Aquila. Il bando si trova al seguente link https://www.univaq.it/section.php?id=1532 Scadenza 19-12-2019 Si prega di darne la massima diffusione, cordiali saluti Davide Gabrielli

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Seminar Berthet @Bocconi
by Giacomo Zanella 25 Nov '19

25 Nov '19

We announce the following DEC Statistics seminar: Thursday, November 28 12:30 Meeting room 3-e4-sr03, Bocconi University, Via Roentgen 1, 3rd floor Quentin Berthet (Google Research) Title: Optimal transport methods in statistics and machine learning: theory and applications Abstract: Optimal transport is one of the foundational problems of optimization, and a very important topic in analysis. It asks how one can transport mass with a given measure to have another measure, with minimal global transport cost. The associated Wasserstein distance is a useful statistical tool to compare distributions, taking into account geometric properties of the data. In this presentation, I will talk about two recent projects on this topic. In the first one, we propose a novel approach for unsupervised embedding alignment, and show applications to natural language processing. It is based on a new approach for Wasserstein loss minimization (joint work with E. Grave and A. Joulin). In the second one, we provide new methods and guarantees for estimation of distributions with smooth densities, in the Wasserstein distance. We show that these tools, inspired by techniques in nonparametric statistics, yield information-theoretic optimal results. We also develop ideas to handle our proposed estimators in a computationally efficient manner, and explore some of the associated computational trade-offs (joint work with J. Weed). Kind regards, Giacomo Zanella The DEC statistics seminars schedule is available at http://www.unibocconi.eu/statseminar Please note: if you are a guest and you do not have a Bocconi ID Card to access to the Bocconi Buildings, please communicate your participation by sending an email to elisa.picassi(a)unibocconi.it

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Extended deadline: MAF 2020 - 9th International Conference MATHEMATICAL AND STATISTICAL METHODS FOR ACTUARIAL SCIENCES AND FINANCE
by Marco Corazza 25 Nov '19

25 Nov '19

*CALL FOR CONTRIBUTIONS - EXTENDED DEADLINE* *MAF 2020 - 9th International Conference MATHEMATICAL AND STATISTICAL METHODS FOR ACTUARIAL SCIENCES AND FINANCE*April 15-17, 2020 - Geneve (CH) *https://www.unige.ch/maf2020/ <https://www.unige.ch/maf2020/>* * The Steering Committee is delighted to announce the 9th International Conference *MAF 2020*. * *MAF 2020* promotes interaction between *mathematicians* and *statisticians* in *actuarial sciences* and *finance*. * *MAF 2020* is open to *academicians* and to *professionals*, to encourage cooperation. * *MAF 2020* covers a *wide variety of subjects* in actuarial science and financial fields. * *MAF 2020* will be held at the *Université de Genève*, in *April 15-17*, *2020*. * *We invite submission of original contributions*. * *Important DEADLINE*: - Submission of 1-page abstracts: December 20th, 2019. - Organized session proposals: December 20th, 2019. - Submission of short papers (facultative): December 20th, 2019. - Early bird registration: December 20th, 2019. *The accepted short papers, at least 4 pages and at most 6 pages, will be included in a Springer Volume. * Keynote speakers - *Michael O'Neill*, Centre for Business Analytics, University College Dublin; - *Jaap Spronk*, Erasmus School of Economics (NEH) & Rotterdam School of Management - *Howell Tong*, London School of Economics and Political Science Apologies for cross-posting. The warmest regards, Marco CORAZZA | Ca'Foscari University of Venice (I) [Behalf of the Steering Committee] Manfred GILLI | University of Geneve (CH) Cira PERNA | University of Salerno (I) Claudio PIZZI | Ca'Foscari University of Venice (I) Marilena SIBILLO | University of Salerno (I)

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Seminatio Pierre Patie @ UniTo - 5 Dicembre
by Bruno Toaldo 25 Nov '19

25 Nov '19

********************************************************************* SEMINARI DI PROBABILITÀ E STATISTICA MATEMATICA DIPARTIMENTO DI MATEMATICA "G. PEANO" UNIVERSITÀ DEGLI STUDI DI TORINO ********************************************************************* Giovedì 5 Dicembre 2019 alle ore 14:00 nell'aula Magna del Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, Il Prof. *Pierre Patie* (Cornell University, Ithaca, NY, USA) terrà un seminario dal titolo *Completely monotone intertwining relations* Abstract: In this talk, we introduce the concept of completely monotone intertwining relations as a strengthening of usual intertwining relations between Markov semi-groups. We proceed by providing some interesting applications of this new idea which includes the characterization of ergodic constants and hypercontractivity estimates for non-self-adjoint semigroups. We illustrate these results by presenting several examples that have emerged from the recent literature: discrete-to-continuous interacting particle models, degenerate hypoelliptic Ornstein-Uhlenbeck processes, and diffusion-to-jump Jacobi processes. This talk is based on a joint a work with L. Miclo (IMT Toulouse). Tutti gli interessati sono invitati a partecipare.

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First Announcement Conference SPDE&A Levico 2020
by Stefano Bonaccorsi 25 Nov '19

25 Nov '19

First Announcement of the Conference on Stochastic Partial Differential Equations & Applications - XI edition We are pleased to inform you that the "Conference on Stochastic Partial Differential Equations & Applications" will be held from June 1st to June 5th, 2020 in Levico Terme (Trento, Italy). This is the XI-th edition of a series of conferences on SPDEs which, during the years, has become one of the most popular occasions for the community to meet and discuss the latest developments. This year we have, for the first time, 4 mini-courses given by (1) Francesco Caravenna (Italy) (2) Martin Hairer (UK) (3) Martina Hofmanova (Germany) (4) Nikolay Tzvetkov (France) All the researchers in the field are invited to participate. We especially invite young researchers (at Ph.D. or Post-doctorate level) to attend the conference and give a short presentation in dedicated sessions we aim to organize. We are trying to secure funds to support their expenses. Any further information can be found in the website of the conference: https://spdelevico2020.wordpress.com/ Best regards, Stefano Bonaccorsi, Sandra Cerrai, Franco Flandoli, Lorenzo Zambotti (organizing committee)

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