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PIETRO CAPUTO - GIOVEDI 29 - TOR VERGATA - CICLO SEMINARI PASCAL
by Valentina Cammarota 27 Oct '15

27 Oct '15

Ciclo di Seminari - Progetto ERC grant PASCAL (Probabilistic and Statistical Techniques for Cosmological Applications) Giovedi` 29 ottobre ore 15:00 Aula Dal Passo Dipartimento di Matematica Università di Roma Tor Vergata Prof. Pietro Caputo Dipartimento di Matematica e Fisica, Università Roma Tre Titolo: Dynamical phase transition in random lattice triangulations Abstract: We consider lattice triangulations, i.e., triangulations of the integer points in Euclidean plane. Our focus is on random triangulations in which a triangulation \sigma has weight \lambda^{|\sigma|}, where \lambda is a positive real parameter and |\sigma| is the total length of the edges in \sigma. Empirically, this model exhibits a phase transition at \lambda=1 (corresponding to the uniform distribution): for \lambda<1 distant edges behave essentially independently, while for \lambda>1 very large regions of aligned edges appear. We substantiate this picture as follows. For \lambda<1 sufficiently small, we show that correlations between edges decay exponentially with distance (suitably defined), and also that the Glauber dynamics, namely the local Markov chain based on flipping edges, is rapidly mixing (in time polynomial in the number of edges in the triangulation). By contrast, for \lambda>1 we show that the mixing time is exponential. For thin rectangular regions we obtain sharp mixing time bounds for all values of \lambda<1. This is joint work with F. Martinelli, A. Sinclair and A. Stauffer Tutti gli interessati sono invitati a partecipare. . Valentina Cammarota Department of Mathematics Universita` degli Studi di Roma Tor Vergata http://www.mat.uniroma2.it/english.php https://sites.google.com/site/valentinacammarota/

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Doctoral Seminar at LUISS
by Marco Scarsini 27 Oct '15

27 Oct '15

This is to invite you to our next doctoral seminar, on Thursday, October 29th, from 13:00 to 14:00 in room 405b. The speakers is Anna Zseleva (Maastricht University). The work presented will be: Title: Zero-sum games with charges Abstract: We consider two-player zero-sum games with infinite action spaces and bounded payoff functions. The players' strategies are finitely additive probability measures, called charges. Since a strategy profile does not always induce a unique expected payoff, we distinguish two extreme attitudes of players. A player is viewed as pessimistic if he always evaluates the range of possible expected payoffs by the worst one, and a player is viewed as optimistic if he always evaluates it by the best one. This approach results in a definition of a pessimistic and an optimistic value for each player. We provide an extensive analysis of the relation between these values, and connect them to the classical values. In addition, we also examine existence of optimal strategies with respect to these values. Updated calendar of our seminars at: http://ricerca.economiaefinanza.luiss.it/calendar ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza LUISS Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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DRM 2015 - final program
by Fabio Bellini 27 Oct '15

27 Oct '15

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seminario di Pablo Rodriguez a Milano-Bicocca
by daniela.bertacchi 26 Oct '15

26 Oct '15

~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ ANNUNCIO DI SEMINARIO ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~ Il giorno 30 ottobre 2015, alle ore 14 in aula 2109 del Dipartimento di matematica e Applicazioni dell'Università di Milano-Bicocca, il dott. PABLO RODRIGUEZ (Department of Applied Math. and Statistics, Universidade de Sao Paulo. Sao Carlos, Brazil.) terrà un seminario dal titolo PHASE TRANSITIONS IN SOME STOCHASTIC TOY-MODELS. Abstract: The aim of the talk is to discuss about the formulation and phase transition results regarding three stochastic toy-models. More precisely, we consider a modified ErdosRényi random graph, an accessibility percolation model on trees and an interacting particle system on Zd. We will discuss about motivation, results, open problems, and some ideas for the proofs. Tutti gli interessati sono invitati a partecipare Daniela Bertacchi ********************************************* * Daniela Bertacchi * Dipartimento di Matematica e Applicazioni * Università di Milano-Bicocca * Via Cozzi 53 * 20125 Milano * * Tel. +39 0264485716 * Fax +39 0264485705 * email: daniela.bertacchi(a)unimib.it * http://www.matapp.unimib.it/~bertacchi *********************************************

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Postdoc on Models and algorithms for large networks from Big Data
by Fabrizio Lillo 26 Oct '15

26 Oct '15

The call for a two-year postdoc is open at the Scuola Normale Superiore di Pisa (Italy). The topic of the research is *Models and algorithms for large networks from Big Data”* under the following EU project: *“SoBigData Research Infrastructure”, *Acronym “*SoBigData*” (call H-2020-INFRAIA-2014-2015). The details of the call are at http://www.sns.it/en/servizi/job/assegnidiricerca/assegno502/ The research fellow shall carry out the following activities: study and implementation of models and algorithms for the study and inference of large complex networks of social, economic, financial, and computational origin; networks from time series; social pattern discovery; empirical analysis of Big Data. The deadline is November 9. I would be grateful if you could forward this message to any potentially interested candidate. The interested candidates can either contact me (fabrizio.lillo(a)sns.it) or the addresses in the call in case they need further information. Thanks and all the best, Fabrizio Lillo ---------------------------------------- Fabrizio Lillo Scuola Normale Superiore di Pisa Piazza dei Cavalieri 7 56126 Pisa ITALY Check the new website: fabriziolillo.wordpress.com phone: +39 050509159

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LUISS Seminar_28/10 Alessandro Arlotto
by Marco Scarsini 26 Oct '15

26 Oct '15

The next Research Seminar of Economics and Finance Dept. is scheduled for Wednesday, October 28th , from 2.30 p.m. to 4.00 p.m., room 205/a, viale Romania. Our guest speaker will be Prof. Alessandro Arlotto (Duke University), who will held a lecture titled “Markov Decision Problems Where Means Bound Variances” Abstract We identify a rich class of finite-horizon Markov decision problems (MDPs) for which the variance of the optimal total reward can be bounded by a simple linear function of its expected value. The class is characterized by three natural properties: reward nonnegativity and boundedness, existence of a do-nothing action, and optimal action monotonicity. These properties are commonly present and typically easy to check. Implications of the class properties and of the variance bound are illustrated by examples of MDPs from operations research, operations management, financial engineering, and combinatorial optimization. Best regards, Dipartimento di Economia e Finanza Viale Romania, 32 - 00197 Roma economiaefinanza(a)luiss.it t +39 06 85225550 f +39 06 85225985

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Seminario Sergio Albeverio: Symmetries and stochastic differential equations (DipInf - UniVr)
by Luca di persio 23 Oct '15

23 Oct '15

Giovedi' 29 Ottobre, ore 16:30 (16:15 rinfresco, 16:30 inizio seminario) Presso: Dipartimento di Informatica (Sala Verde) Strada le Grazie, 15 https://goo.gl/maps/6mB9N2SSeqC2 Il prof. Sergio Albeverio (HCM - UniBonn) terrà il seguente seminario Title: Symmetries and stochastic differential equations. Abstract: Recently the study of relations between symmetries and stochastic (partial) differential equations has received renewed interest,in particular in relations with areas like hydrodynamics,finance and quantum field theory.The seminar will briefly present some of these developments. Speaker: Sergio Albeverio, HCM - University of Bonn __ Luca Di Persio - PhD assistant professor of Probability and Mathematical Finance Dept. Informatics University of Verona strada le Grazie 15 - 37134 Verona - Italy Dept. Math University of Trento V. Sommarive, 14 - 38123 Povo - Italy Tel : +39 0461 281686

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RETTIFICA ORARIO SEMINARIO PABLO RODRIGUEZ
by Angelica Yohana Pachon Pinzon 22 Oct '15

22 Oct '15

****************************************************** SEMINARI DI PROBABILITA' E STATISTICA DIPARTIMENTO DI MATEMATICA G. PEANO UNIVERSITA' DEGLI STUDI DI TORINO ****************************************************** *Si comunica che il seminario del Dott. Pablo Rodriguez e' spotato alle ore 12:00 del 29/10/2015 in Aula 1 presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10. * Il Dott. PABLO RODRIGUEZ (Department of Applied Math. and Statistics, Universidade de São Paulo. São Carlos, Brazil.) terrà un seminario dal titolo PHASE TRANSITIONS IN SOME STOCHASTIC TOY-MODELS. Abstract: The aim of the talk is to discuss about the formulation and phase transition results regarding three stochastic toy-models. More precisely, we consider a modified Erdős–Rényi random graph, an accessibility percolation model on trees and an interacting particle system on Zd. We will discuss about motivation, results, open problems, and some ideas for the proofs. Tutti gli interessati sono invitati a partecipare. Cordiali saluti, Angelica Pachon. ---------------------------------------------------------- Dipartimento di Matematica “Giuseppe Peano” Università degli Studi di Torino Via Carlo Alberto 10, 10123 Torino

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RETIFICA ORARIO SEMINARIO PABLO RODRIGUEZ
by Angelica Yohana Pachon Pinzon 22 Oct '15

22 Oct '15

****************************************************** SEMINARI DI PROBABILITA' E STATISTICA DIPARTIMENTO DI MATEMATICA G. PEANO UNIVERSITA' DEGLI STUDI DI TORINO ****************************************************** S Giovedi 29 Ottobre 2015 alle ore 11:00 in Aula 3 presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, Il Dott. PABLO RODRIGUEZ (Department of Applied Math. and Statistics, Universidade de São Paulo. São Carlos, Brazil.) terrà un seminario dal titolo PHASE TRANSITIONS IN SOME STOCHASTIC TOY-MODELS. Abstract: The aim of the talk is to discuss about the formulation and phase transition results regarding three stochastic toy-models. More precisely, we consider a modified Erdős–Rényi random graph, an accessibility percolation model on trees and an interacting particle system on Zd. We will discuss about motivation, results, open problems, and some ideas for the proofs. Tutti gli interessati sono invitati a partecipare

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Seminario PABLO RODRIGUEZ
by Angelica Yohana Pachon Pinzon 21 Oct '15

21 Oct '15

****************************************************** SEMINARI DI PROBABILITA' E STATISTICA DIPARTIMENTO DI MATEMATICA G. PEANO UNIVERSITA' DEGLI STUDI DI TORINO ****************************** ************************ Giovedi 29 Ottobre 2015 alle ore 11:00 in Aula 3 presso il Dipartimento di Matematica "G. Peano" dell'Università degli Studi di Torino, Via Carlo Alberto 10, Il Dott. PABLO RODRIGUEZ (Department of Applied Math. and Statistics, Universidade de São Paulo. São Carlos, Brazil.) terrà un seminario dal titolo PHASE TRANSITIONS IN SOME STOCHASTIC TOY-MODELS. Abstract: The aim of the talk is to discuss about the formulation and phase transition results regarding three stochastic toy-models. More precisely, we consider a modified Erdős–Rényi random graph, an accessibility percolation model on trees and an interacting particle system on Zd. We will discuss about motivation, results, open problems, and some ideas for the proofs. Tutti gli interessati sono invitati a partecipare.

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