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2015/16 PhD program at IMT Institute for Advanced Studies Lucca
by Irene Crimaldi 21 May '15

21 May '15

*2015/16 PhD program at IMT Institute for Advanced Studies LuccaDeadline for applications – June 29 th 2015, 6 pm Italian time* To apply: www.imtlucca.it/phd/prospective/application Applications are now being accepted for the 2015/16 PhD program at the IMT Institute for Advanced Studies Lucca (www.imtlucca.it). Highly motivated candidates are invited to apply for one of the *35 fully-funded scholarships* within a doctoral program that integrates scientific competences of economics, engineering, computer science, physics, applied mathematics, statistics, history and sciences of cultural heritage. The three-year program is articulated in *3 field-specific curricula *which, in many instances, share a common scientific background. IMT Lucca PhD students will focus their academic experiences in one of the 10 different research units. This concentrated approach enables students to gain the maximum benefit from their time in the program and to effectively prepare themselves to excel in careers in research and academia in their chosen field. Candidates can apply for one (or more) of the following curricula: *- Computer Science and Systems Engineering (CSSE)- Economics, Management and Data Science (EMDS)- Analysis and Management of Cultural Heritage (AMCH)* Courses are led by world-renowned researchers and provide students with the necessary theoretical skills and advanced tools for rigorously tackling a multitude of analysis, design and management problems within the broad framework of systems analysis. Specialized faculty and staff create a network that provides key guidance and support throughout the PhD Program. Working closely with faculty, both in the classroom and in the development of research, students reach the highest levels of scholarly achievement. In fact, IMT's outgoing PhDs will be able to use the skills they obtained during their studies to recognize and resolve complex problems to choose the most appropriate method or instrument to utilize when affronting these problems, even in disciplines outside of their primary field of research. *All students are based in the recently restored San Francesco complex, a fully integrated campus in the historical center of the beautiful Tuscan city of Lucca. *The campus *includes residential facilities, an on-site canteen, study and living rooms, and outdoor recreational spaces*; all serving to add a cultural and social dimension to the professional experience of our doctoral program. Eligible students will also receive a *research scholarship *which amounts to approximately €13,600/year. Our PhD program attracts students from around the world, providing a truly international environment. *English is the official language of the Institute.* Besides, to further enhance the internationality of the program, all students have the opportunity to *spend periods abroad *at research institutes or laboratories or universities, both within the Erasmus+ framework or through ad hoc mobility agreements. To find out more about the Institute, the admission requirements and how to apply; please see www.imtlucca.it/phd *The deadline for applications is June 29 th 2015, 6 pm Italian time.* Find IMT on Facebook, Twitter, LinkedIn and YouTube for the latest news.

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[amases-soci] Fwd: Concorso di ricercatore a tempo determinato (fwd)
by Tiziano Vargiolu 20 May '15

20 May '15

---------- Messaggio inoltrato ---------- Da: "Anna Rita Bacinello" <bacinel(a)units.it> Data: 20/Mag/2015 15:34 Oggetto: Concorso di ricercatore a tempo determinato Cc: Carissimi, Sull'Albo Ufficiale d'Ateneo (http://www.units.it/ateneo/albo/) il giorno 18/05/2015 ? stato pubblicato il bando relativo alla pubblica selezione per l'assunzione di un ricercatore a tempo determinato presso l?Universit? di Trieste, ai sensi dell'art. 24 della legge 30 dicembre 2010 n. 240, nel Settore concorsuale 13/D4 - Settore scientifico-disciplinare: SECS-S/06 (la registrazione all?albo porta il numero 395, il relativo Decreto ha il numero 427). Potresti per cortesia far circolare la notizia fra i soci? Grazie. Un caro saluto, a presto, Anna Rita

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Postdoc position in Gottingen
by Alessio Farcomeni 20 May '15

20 May '15

With apologies for cross-posting. Alessio

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Avviso di mini-corso :: Sartori@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 19 May '15

19 May '15

----------------------------------------------------------------------------- A v v i s o d i M i n i - C o r s o ----------------------------------------------------------------------------- Giovedì, 18 Giugno, ore 10:00-13:00 e 14:00-16:00 Venerdì, 19 Giugno, ore 10:00-13:00 e 14:00-16:00 ----------------------------------------------------------------------------- Aula VII (laboratorio informatica, piano terra) Dipartimento di Scienze Statistiche Sapienza Università di Roma NICOLA SARTORI (Dipartimento di Scienze Statistiche, Università di Padova) terrà un mini-corso rivolto principalmente (ma non solo) agli studenti di dottorato dal titolo L I K E L I H O O D A S Y M P T O T I C S Il corso è gratuito ma, dato il numero limitato di postazioni disponibili in laboratorio, tutti gli interessati sono invitati a **prenotarsi** compilando il seguente form on line: url: https://goo.gl/iw2k7J Al più tardi entro Mercoledì 3/6 verrà inviata conferma definitiva dell'effettiva disponibilità del posto richiesto all’indirizzo email fornito. Ovviamente “first come, first served”, con possibile piccolo bias (as usual) in favore di studenti di dottorato. ----------------------------------------------------------------------------- Maggiori informazioni sui seminari e mini-corsi presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti --- Syllabus sintetico (esteso allegato): - Likelihood inference (first-order asymptotics) - Numerical and graphical aspects in R - Higher order asymptotics - Asymptotic theory for estimating equations and pseudolikelihoods

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Seminario PERIN (RGS, ADAMSS, CIMAB & Matematica Applicata)
by Giacomo Aletti 18 May '15

18 May '15

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti -------------- Nell'ambito dei Reading Group Seminars e del Seminario di Matematica Applicata, in collaborazione col centro ADAMSS e il CIMAB, il giorno lunedì 25 Maggio 2015, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, "Information coding in vestibular hair cells" Paola PERIN University of Pavia Abstract: Hair cells are the mechanoreceptors in our auditory and vestibular systems. Vestibular afferent neurons are classified on the basis of their motion selectivity (direction, response to linear vs. angular motion), discharge regularity, gain and dynamics (tonic vs. phasic). The properties of vestibular hair cells and afferent fibers are optimized for the transduction for low frequency stimuli (head motion, mostly below 50 Hz). Moreover, vestibular hair cells display a resting transmitter release rate which is used to set a baseline: increases above resting discharge signal movements in one direction, decreases signal movements in the opposite direction. Whereas discharge regularity appears to be a postsynaptic property, afferent dynamics is determined presynaptically, but the mechanisms involved are still unclear. In our work we have recorded currents, voltages and release from vestibular hair cells from the frog utricle and built a model of a hair cell connected to an afferent fiber upon mechanical stimulation. Our results suggest that dynamics is affected by ion currents (especially BK and IA) whereas presynaptic release properties affect resting discharge but not postsynaptic dynamics. ================ Per chi volesse seguire il seminario in remoto ricordo inoltre che sarà possibile dopo aver segnalato il proprio interessamento entro le 12 del giorno del seminario. ================= Reading Group Seminars: The Reading Group Seminars (RGS) are organized within an open community of researchers interested in applying up to date mathematical modeling and data analysis approaches to the study of biological systems. The RGS take place at the Math. Department in Milan (via Saldini). Initiatives and updates are published on the website: http:// rgs.mat.unimi.it/.

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Seminario TARDELLA
by Matteo Ruggiero 15 May '15

15 May '15

**************************************************************** STATISTICS SEMINARS @ COLLEGIO CARLO ALBERTO **************************************************************** Venerdi 22 Maggio 2015 alle ore 12:00, presso l’Aula Rossa del Collegio Carlo Alberto, Moncalieri (TO), si terra' il seguente seminario: Luca TARDELLA (Università di Roma "La Sapienza”) FLEXIBLE BEHAVIORAL CAPTURE-RECAPTURE MODELLING Abstract: We develop some new strategies for building and fitting new flexible classes of para- metric capture-recapture models for closed populations which can be used to address a better understanding of behavioural patterns. We first rely on previous approaches based on a conditional probability parameterization and review how to regard a large subset of standard capture-recapture models as a suitable partitioning in equivalence classes of the full set of conditional probability parameters. We then propose a regression approach combined with the use of new suitable quan- tifications of the conditioning binary partial capture histories as a device for enlarging the scope of flexible behavioural models and also exploring the range of all possible partitions. We show how one can easily find unconditional MLE of such models within a generalized linear model framework. We illustrate the potential of our approach with the analysis of some known datasets and a simulation study. Tutti gli interessati sono invitati a partecipare. Il seminario e' organizzato dalla "de Castro" Statistics Initiative (http://www.carloalberto.org/stats) in collaborazione con il Collegio Carlo Alberto. Cordiali saluti, Matteo Ruggiero --- Matteo Ruggiero University of Torino and Collegio Carlo Alberto www.matteoruggiero.it

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de Finetti Risk Seminar - May 2015
by Emanuela Rosazza 14 May '15

14 May '15

On behalf of the Scientific Committee of the de Finetti Risk Seminars, we are glad to invite you to participate at the following Lecture Financial Models with Defaultable Numeraires Johannes Ruf University College London ABSTRACT Financial models are studied where each asset may potentially lose value relative to any other. To this end, the paradigm of a pre-determined nume raire is abandoned in favour of a symmet- rical point of view where all assets have equal priority. This approach yields novel versions of the Fundamental Theorems of Asset Pricing, which clarify and extend non-classical pricing formulas used in the financial community. Furthermore, conditioning on non-devaluation, each asset can serve as nume raire and a classical no-arbitrage condition be formulated. It is shown when and how these local conditions can be aggregated to a global no-arbitrage condition. Joint work with Travis Fisher and Sergio Pulido LOCATION: The seminar will be held on Wednesday, May 20, at 18.00, Aula di Rappresentanza, Dipartimento di Matematica, Università di Milano, Via Saldini 50, Milano. A refreshment will be offered at 17.30. Scientific Committee: Prof. Marco Frittelli (Univ. degli Studi di Milano) Prof. Fabio Maccheroni (Univ. Bocconi) Prof. Massimo Marinacci (Univ. Bocconi) Prof. Emanuela Rosazza Gianin (Univ. Milano-Bicocca) Dott. Simone Cerreia-Voglio (Univ. Bocconi) Dott. Marco Maggis (Univ. degli Studi di Milano) **************************************************** Emanuela Rosazza Gianin Dipartimento di Statistica e Metodi Quantitativi Università di Milano Bicocca Edificio U7 – 4° Piano Via Bicocca degli Arcimboldi, 8 20126 Milano Tel. 02 64483208 Fax. 02 64483105 e-mail: emanuela.rosazza1(a)unimib.it *****************************************************

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Seminario di Probabilita' - Universita' di Padova
by alessandra bianchi 12 May '15

12 May '15

Ho il piacere di invitarvi al seguente seminario, che si terrà lunedì 18 maggio alle ore 14:30 nell'aula 2BC30 del Dipartimento di Matematica dell'Universita' degli Studi di Padova. SPEAKER: Stefan Grosskinsky (Mathematics Institute, University of Warwick) TITLE: Metastability in condensing zero-range processes ABSTRACT: We consider a zero-range process with jump rates decreasing with the occupation number, which is known to exhibit a condensation phenomenon where a finite fraction of all particles concentrates on a single lattice site. We derive a scaling limit for the asymptotic stationary dynamics of the condensate location in the thermodynamic limit on a one-dimensional torus. Our proof follows previously developed methods using potential theory and a martingale approach, which have been applied to zero-range processes on finite lattices. The main challenge and novelty of our paper arises from the absence of attractor states which complicates the proof of equilibration within metastable wells and requires a coupling argument to get uniform bounds on exit rates from wells. This is joint work with Ines Armendariz and Michalis Loulakis. -- 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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Seminario di Petr Veverka a Pavia
by Carbone Raffaella 11 May '15

11 May '15

Cari colleghi, vi annuncio che giovedì 14 Maggio 2015, alle ore 15 precise, presso la sala conferenze dell’IMATI-CNR di Pavia, il Dr. Petr Veverka (Politecnico di Milano) terrà un seminario dal titolo: STOCHASTIC MAXIMUM PRINCIPLE FOR NEAR-OPTIMALITY AND ITS APPLICATION TO FORWARD-BACKWARD STOCHASTIC SYSTEMS WITH JUMPS Abstract. In the talk, Zhou's near-optimal stochastic maximum principle will be recalled and used for deriving the necessary and sufficient conditions for near-optimality of controlled nonlinear stochastic systems governed by Forward-Backward Stochastic Differential Equation with jumps. The result is a joint work of P.V., M. Hafayed and S. Abbas. -- Raffaella Carbone, PhD Ricercatore di Probabilità e Statistica Matematica Dipartimento di Matematica dell'Università degli Studi di Pavia

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Seminario Dott.Torrisi (presso Dip. Scienze Statistiche, Roma)
by Alessandro Degregorio 11 May '15

11 May '15

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 15 Maggio, ore 10,30 ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma Dott. Giovanni Luca Torrisi (CNR-Istituto per le Applicazioni del Calcolo) Title Probability approximation of spatial point processes Abstract: We give a quantitative Gaussian and Poisson approximation for the first chaos (or innovation) of spatial point processes with conditional intensity. To this aim we use a Malliavin-Stein-Chen approach. This method is essentially based on the following two steps. First, we provide an integration by parts (IBP) formula which relates the first chaos with the discrete Malliavin operator. Second, we derive the probability approximations by combining the IBP formula with the Stein and Chen methods. Our findings extend the corresponding results on the Poisson space due to Peccati, Solè, Taqqu and Utzet (2010) and Peccati (2011). The general bounds presented in this talk are applied to stationary, inhibitory and finite range Gibbs point processes with pair potential, providing explicit error bounds and quantitative limit theorems. Tutti gli interessati sono invitati a partecipare. Saluti Alessandro De Gregorio

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3 PhD programs in Mathematics in Rome
by Domenico Marinucci 08 May '15

08 May '15

Apologies for cross-posting Please forward to whom it might be interested *********************************************************** Starting this year the three public Universities of Rome (Roma La Sapienza, Roma Tor Vergata, Roma 3) are collaborating to create a unique global environment for PhD studies in Mathematics. There are a total of 19 fellowships available. More information and applications at http://www.rome-phd-math-programs.it All interested perspective PhD students are invited to apply. ***********************************************************

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International Conference in Venice - CALL FOR PAPERS - deadline 15th of May
by Monica Billio 07 May '15

07 May '15

14th INTERNATIONAL CONFERENCE C R E D I T 2015 *Societal Fault Lines and Credit Risk: The Impact of Current Economic, Institutional and Political Developments on Credit and Risk* Venice, Italy 1 - 2 October 2015 *GRETA Associati *(Venice, Italy), *Center on Sustainable Architecture for Finance (SAFE) at Goethe University Frankfurt* (Frankfurt, Germany), the *University of Zurich* (Zurich, Switzerland) and *Intesa Sanpaolo *(Milan, Italy) are co-sponsors of a Conference to be held in Venice on October 1-2, 2015. The objective of the Conference is to bring together academics, practitioners and PhD students working in the area of risk management. The conference will provide an opportunity for participants engaged in research at the forefront of this area to discuss both the causes and implications of recent events in financial markets and may, in turn, suggest fruitful directions for future research. The Conference, organised under the auspices of the *Department of Economics of the University Ca Foscari of Venice*, *ABI - Italian Banking Association *and *European Investment Bank*, is the *fourteenth* of a series dedicated to various aspects of credit risk. The organizers encourage submissions of papers on any topic within the overall theme of the conference and in the following areas in particular: * *Wealth inequality, firm financing and credit risk* o Is local wealth inequality affecting the quality of institutions and the choice over market versus bank finance, and thereby determining corporate finance and credit risk outcomes? * *Home ownership and credit risk* o Are measures promoting home ownership or financial innovations responding to an increase in ownership demand, for example, resulting in more credit risk? * *Collateral availability, credit and risk* o Is the availability of collateral determining credit granting and credit risk? * *Banking supervision and credit risk* o Is the level and quality of bank supervision leading to an optimal level of credit risk? o What is the impact of the institutional organization of banking supervision on credit risk? * *Central bank policies and credit risk* o Are monetary conditions drivers of bank credit risk taking? Under all circumstances? The Scientific Committee for the Conference consists of: *Steven Ongena*, University of Zurich, Programme Chair *Mark Carey, *Board of Governors of the Federal Reserve System *Hans Degryse*, KU Leuven *Jan Krahnen*, Goethe University *André Lucas*, VU University Amsterdam *Loriana Pelizzon*, Ca Foscari University of Venice and Goethe University *Stephen Schaefer*, London Business School The final program will include both submitted and invited papers. Acceptances received from invited speakers include *Viral Acharya* (New York University), *Mark Carey* (Board of Governors of the Federal Reserve System), *Hayne Leland* (University of California, Berkeley), *Jean Charles Rochet* (University of Zurich) and *Vikrant Vig* (London Business School). The Conference will also feature a panel discussion on researchers' and practitioners' views of the major outstanding problems. CALL FOR PAPERS Those wishing to present a paper at the Conference should submit by *May 15, 2015 *to the address given below (preferably in electronic format). Please indicate to whom correspondence should be addressed. Decisions regarding acceptance will be made by *July 10, 2015*. The final version of accepted papers must be received by August 31, 2015. Please send papers to: GRETA Associati San Polo, 2605 - 30125 Venice, ITALY Phone : +39 041 5238178 - Fax : +39 041 5286166 e-mail: credit(a)greta.it <mailto:credit@greta.it>

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Fwd: Announcing Workshop Disordered Models in Mathematical Physics
by Francesco Caravenna 06 May '15

06 May '15

> Da: Leonardo Rolla <leonardo.rolla(a)gmail.com> > Oggetto: I: Announcing Workshop Disordered Models in Mathematical Physics > Data: 04 maggio 2015 18:28:07 GMT+02:00 > A: undisclosed-recipients:; > > > Dear colleagues and friends, > > Please find below the announcement of the workshop Disordered Models of Mathematical Physics. > > Feel free to pass it forward. > > Many thanks, > Leo > > > ---------- Forwarded message ---------- > From: Joaquín Fontbona <fontbona(a)dim.uchile.cl> > Date: Wed, Apr 8, 2015 at 3:37 PM > Subject: Announcing Workshop Disordered Models in Mathematical Physics > > Dear colleagues and friends, > > We are pleased to announce the workshop Disordered Models of Mathematical Physics, which will take place in July 21-24, 2015, in Valparaíso, Chile. This workshop is a Satellite Meeting of the XVIII International Congress on Mathematical Physics, which will take place in Santiago, Chile, between July 27 and August 1, 2015. > > The main focus of the workshop will be recent developments in probabilistic models arising from problems in mathematical physics. The meeting is sponsored by Nucleus Millenium Stochastic Models of Complex and Disordered Systems together with the Center for Mathematical Modeling – U. de Chile and the Faculty of Mathematics – PUC. > > > CONFIRMED SPEAKERS > Elie Aïdékon (U. Paris 6) > Daniel Ahlberg (IMPA) > Louis-Pierre Arguin (U. Montréal) > Antonio Auffinger (Northwestern U.) > Yuri Bakhtin (Courant I.) > Paul Bourgade (Courant I.) > Anton Bovier (U. Bonn) > Nicolas Curien (U. Paris-Sud) > Pablo Ferrari (U. Buenos Aires) > Leonid Koralov (U. Maryland) > Davar Khoshnevisan (U. Utah) > Brian Rider (Temple U.) > Leonardo Rolla (U. Buenos Aires) > Arnab Sen (U. Minnesota) > Alexandre Stauffer (U. Bath) > Laurent Tournier (U. Paris 13) > Maria Eulalia Vares (U. F. Rio de Janeiro) > Jun Yin (U. Wisconsin-Madison) > Ofer Zeitouni (Courant I. / Weizmann I.) > > SCIENTIFIC COMMITTEE: Charles Newman (Courant I.), Jeremy Quastel (U. Toronto), Vladas Sidoravicius (IMPA). > > ORGANIZING COMMITTEE: Joaquín Fontbona (U. Chile), Gregorio Moreno (PUC), Alejandro Ramírez (PUC) and Daniel Remenik (U. Chile). > > > We expect to have partial funding for students and young researchers (specially from Latin America) interested in attending the workshop. More details about this will be included in a future announcement. We suggest those who are interested to write to dmmp2015(a)dim.uchile.cl or any of the organizers. > For more details about the workshop you can visit http://eventos.cmm.uchile.cl/dmmp2015/, which we will be updating regularly with information about speakers, program, hotels, etc. > > We hope to see you in Valparaíso! > > Organizing committee > > -- _________________________________________ Francesco Caravenna Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca Via Cozzi 55, 20125 Milano, Italy http://www.matapp.unimib.it/~fcaraven/ _________________________________________

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2 seminari di Andreas Kyprianou
by Matteo Ruggiero 06 May '15

06 May '15

****************************************************************** LAGRANGE LECTURES meet STATISTICS SEMINARS ****************************************************************** Nell’ambito: - delle Lezioni Lagrangiane del Dipartimento di Matematica "G. Peano” dell'Università di Torino; - della Statistics Seminar Series del Collegio Carlo Alberto; ANDREAS KYPRIANOU (University of Bath) terrà due seminari dal titolo DEEP FACTORISATION OF THE STABLE PROCESS I due seminari sono organizzati come consecutivi, il primo più divulgativo e il secondo fruibile da un pubblico più esperto anche senza aver seguito il primo, e si svolgeranno rispettivamente - Giovedì 14 Maggio 2015, ore 15.00, Aula Magna, Dipartimento di Matematica, Via Carlo Alberto 10, Torino - Venerdì 15 Maggio 2015, ore 11.30, Aula Rossa, Collegio Carlo Alberto, via Real Collegio 30, Moncalieri Tutti gli interessati sono invitati a partecipare. I seminari sono organizzati - dal Dipartimento di Matematica "G. Peano” dell’Università di Torino - dalla "de Castro" Statistics Initiative (http://www.carloalberto.org/stats) in collaborazione con il Collegio Carlo Alberto. Segue l’abstract del doppio seminario. Cordiali saluti, Matteo Ruggiero (Università di Torino e Collegio Carlo Alberto) Laura Sacerdote (Università di Torino) Abstract: The Lamperti-Kiu transformation for real-valued self-similar Markov processes (rssMp) states that, associated to each rssMp via a space-time transformation, is a Markov additive process (MAP). In the case that the rssMp is taken to be an α-stable process with α ∈ (0,2), the characteristics of the matrix exponent of the semi-group of the embedded MAP (the Lamperti-stable MAP) are computed. Specifically, the matrix exponent of the Lamperti-stable MAP’s transition semi-group can be written in a compact form using only gamma functions. Just as with Lévy processes, there exists a factorisation of the (matrix) exponents of MAPs, with each of the two factors uniquely characterising the ascending and descending ladder processes, which themselves are again MAPs. To our knowledge, not a single example of such a factorisation currently exists in the literature. In this talk we provide a completely explicit Wiener-Hopf factorisation for the Lamperti-stable MAP. As a consequence of our methodology, we also get additional new results concerning space-time invariance properties of stable processes. --- Matteo Ruggiero University of Torino and Collegio Carlo Alberto www.matteoruggiero.it

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Seminario Prof. Y. Rinott a ROMA 1
by Nappo, Giovanna 06 May '15

06 May '15

********************************************************************* SEMINARIO DI PROBABILITA' E STATISTICA MATEMATICA ******************************************************************** DIPARTIMENTO DI MATEMATICA UNIVERSITA' LA SAPIENZA DI ROMA ******************************************************************** piazzale Aldo Moro 2, 00185 Roma ******************************************************************* Yosi Rinott (The Hebrew University of Jerusalem and LUISS) Title: On Measuring and Comparing Usefulness of Statistical Models Aula di Consiglio del Dipartimento di Matematica Venerdi' 8 maggio, ore 14,30 Abstract: Statistical models in econometrics, biology, and most other areas, should not be expected to be "correct", and often are not very accurate, but may still be useful. The choice of a model for the analysis of data depends on the purpose of the analysis, the nature of the data, and also on the sample or data size. Erev, Roth, Slonim and Barron (2007) [Economic Theory, 33, 29–51] studied models for prediction of future play in game-theoretic experiments and proposed an approach for quantification of the value of a model. Combining ideas from the latter article and the well-known AIC criterion, we propose another quantification of the chosen model's relative predictive value, which depends on the data and its size. Our research was first motivated by data from experimental economics, and we also study the Hardy-Weinberg model in biology. Joint work with David Azriel ************************************************************************************* Tutti gli interessanti sono invitati a partecipare. Giovanna Nappo

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Seminario ANDREAS KYPRIANOU
by Federico Polito 06 May '15

06 May '15

********************************************************************* SEMINARI DI PROBABILITA' E STATISTICA MATEMATICA DIPARTIMENTO DI MATEMATICA "G. PEANO" UNIVERSITA' DEGLI STUDI DI TORINO ********************************************************************* Nell'ambito delle "Lezioni Lagrangiane" del Dipartimento di Matematica "G. Peano", Università degli Studi di Torino, Via Carlo Alberto 10, giovedì 14 Maggio 2015 alle ore 15:00 in Aula Magna, Il Prof _ANDREAS KYPRIANOU_ (Department of Mathematical Sciences, University of Bath) terrà un seminario dal titolo _DEEP FACTORISATION OF THE STABLE PROCESS_ Abstract: The Lamperti-Kiu transformation for real-valued self-similar Markov processes (rssMp) states that, associated to each rssMp via a space-time transformation, is a Markov additive process (MAP). In the case that the rssMp is taken to be an α-stable process with α ∈ (0,2), the characteristics of the matrix exponent of the semi-group of the embedded MAP (the Lamperti-stable MAP) are computed. Specifically, the matrix exponent of the Lamperti-stable MAP’s transition semi-group can be written in a compact form using only gamma functions. Just as with Lévy processes, there exists a factorisation of the (matrix) exponents of MAPs, with each of the two factors uniquely characterising the ascending and descending ladder processes, which themselves are again MAPs. To our knowledge, not a single example of such a factorisation currently exists in the literature. In this talk we provide a completely explicit Wiener-Hopf factorisation for the Lamperti-stable MAP. As a consequence of our methodology, we also get additional new results concerning space-time invariance properties of stable processes. 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 6702937 Web: www.federicopolito.it

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(senza oggetto)
by Mariani, Mauro 06 May '15

06 May '15

Cari amici vi invito a partecipare al seminario di Max Fathi (Università di Parigi Jussieu) presso il dipartimento di matematica dell'università di Roma La Sapienza (sito in piazzale Aldo Moro 5, Roma), i cui dettagli sono riportati di seguito. A presto Mauro Mariani Data ed aula: lunedì 11 maggio, ore 14:30, aula di consiglio (primo piano) Titolo: A gradient flow approach to large deviations for diffusion processes Sunto: In the 80s, De Giorgi introduced the notion of abstract gradient flows, which allowed to define a notion of solutions to ordinary differential equations of the form x' = −grad F(x) on metric spaces (rather than Riemannian manifolds for the usual definition). In 2005, Ambrosio, Gigli and Savare showed that when we consider the space of probability measures on R d endowed with the Wasserstein metric, this notion allows to give an alternate formulation for Fokker-Planck equations. These equations are the PDEs whose solutions are the flow of marginals of solutions of stochastic differential equations of the form dX = −grad H(X)dt + dB . In this talk, I will explain how we can use this notion to study large deviations for sequences of SDEs. The main result is that proving a large deviation principle is equivalent to studying the limit of a sequence of functionals that appear in the abstract gradient flow formulation for Fokker-Planck equations. As an application, I will show how to obtain large deviations from the hydrodynamic scaling limit for a system of interacting continuous spins in a random environment.

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Rettifica data e ora seminario di Thomas Richthammer a Roma Tre
by Pietro Caputo 06 May '15

06 May '15

Prof. Thomas Richthammer (Univ. Hildesheim) Title: The variance of particle positions in the hard disk model When: Giovedi' 14 Maggio 2015 ORE 14:00 Where: Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre AULA 311 (SEMINARI) Largo San L. Murialdo,1 Abstract: The hard disk model describes random configurations of disks in the plane, interacting only via hard core exclusion. It is believed that the model exhibits a weak form of crystallization for large activity (i.e. high particle density). In spite of its simplicity, there are only very few rigorous results on the hard disk model. I will present a very recent result which can be interpreted as a lower bound on the variance of particle positions in terms of the size of the system. The result is obtained via a certain tansformation on particle configurations. It builds on an earlier result concerning the absence of positional order.

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Convegno in onore di Patrizia Berti - Programma e Pagina web
by Fabrizio Leisen 05 May '15

05 May '15

Gentili Colleghi, con grande piacere vi segnalo(per la seconda volta) il seguente convegno organizzato in onore della Prof. ssa Patrizia Berti: Alcuni argomenti di Probabilita', Statistica e Teoria della Misura Modena, 8-9 giugno 2015 Il programma del convegno é disponibile alla seguente pagina web: https://sites.google.com/site/convegnoprofpatriziaberti/ con alcune utili informazioni. Anche se la partecipazione al convegno é gratuita, vi chiediamo gentilmente di inviare una mail al comitato organizzatore per confermare la vostra presenza(vedi pagina web). Un cordiale saluto, Fabrizio Leisen, Pietro Rigo, Emanuele Dolera -- Fabrizio Leisen Senior Lecturer in Statistics School of Mathematics, Statistics and Actuarial Sciences Cornwallis Building, University of Kent, Canterbury, CT2 7NF http://www.kent.ac.uk/smsas/statistics/our-people/profiles/leisen_fabrizio.… http://sites.google.com/site/fabrizioleisen/

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Seminario Prof. Penson (presso Dip. Scienze Statistiche, Roma)
by Alessandro Degregorio 05 May '15

05 May '15

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 8 Maggio, ore 11 ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma PROF. K.A. PENSON (Theoretical Physics, Sorbonne, Univ. Paris VI, France) terrà un seminario dal titolo: *PROBABILISTIC AND FREE-PROBABILISTIC PROPERTIES OF 2D CONSTELLATION NUMBERS* *Abstract:* After a short introduction about the properties of classical Catalan numbers and their role in Physics we shall dwell on a certain quite vast generalisation of Catalan numbers called the constellation numbers. We solve exactly the Hausdorff moment problem for these numbers and provide explicit expressions for appropriate positive weight functions. For certain values of parameters we analyse the properties of these solutions from the point of view of the free probability, and demonstrate their infinite divisibility with respect to the free additive convolution. We introduce the idea of fractional constellation numbers and provide complete solutions to this particular case. Tutti gli interessati sono invitati a partecipare. Saluti Alessandro De Gregorio

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Seminario di Yinon Spinka a Roma Tre
by Pietro Caputo 05 May '15

05 May '15

Yinon Spinka (Tel Aviv) Title: Long-range order in random 3-colorings When: Martedi' 19 Maggio 2015 ORE 14:00 Where: Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre AULA 311 (SEMINARI), Largo San L. Murialdo, 1 Abstract: We study the anti-ferromagnetic 3-state Potts model of statistical physics. In this model, one samples a random coloring of a box in Z^d with 3 colors, with the probability of a coloring f being proportional to exp(-beta*N(f)), where beta>0 is a parameter (representing the inverse temperature) and N(f) is the number of edges connecting vertices colored with the same color. Our main result is that in high dimensions and low temperature (large beta), a sampled coloring will typically exhibit long-range order, placing the same color at most of either the even or odd vertices of the box. This extends previous work of Galvin, Kahn, Peled, Randall and Sorkin. The main ingredient in our proof is a new structure theorem for 3-colorings which characterizes the ways in which different "phases" may interact, putting special emphasis on the role of edges connecting vertices of the same color. We also discuss several related conjectures. No background in statistical physics will be assumed and all terms will be explained. Joint work with Ohad Feldheim.

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Seminario di Quentin Berger a Roma Tre
by Pietro Caputo 05 May '15

05 May '15

Prof. Quentin Berger (Universita' Parigi 6) When: Mercoledi 13 maggio ore 11, Where: Aula 211, Pal. C Dip. Matematica e Fisica, RomaTre, Largo San L. Murialdo, 1 - 00146 Roma Title: Disorder relevance for the pinning model (joint work with Hubert Lacoin) Abstract: A central question in the study of disordered systems (and in particular of their phase transition) is that of disorder relevance: one wants to determine whether an arbitrarily small quantity of disorder affects or not the critical behavior of the system. The physicist Harris provided a simple and general criterion to know whether disorder was relevant or irrelevant for a given d-dimensional system. In this talk, we will introduce the pinning model, a family of disordered systems, which has attracted much attention in the past decade: it considers a 1-dimensional polymer chain interacting with an inhomogeneous defect line, undergoing a localization phase transition. For this model, Harris' prediction has been rigorously proved, but the marginal case (for which Harris criterion gives no prediction) was partially left open. We will present here a necessary and sufficient condition for disorder relevance for the pinning model, solving completely the question for this model.

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Seminario di Thomas Richthammer a Roma Tre
by Pietro Caputo 05 May '15

05 May '15

Prof. Thomas Richthammer (Univ. Hildesheim) Title: The variance of particle positions in the hard disk model When: Martedi' 12 Maggio 2015 ORE 15:00 Where: Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre AULA 311 (SEMINARI) Largo San L. Murialdo,1 Abstract: The hard disk model describes random configurations of disks in the plane, interacting only via hard core exclusion. It is believed that the model exhibits a weak form of crystallization for large activity (i.e. high particle density). In spite of its simplicity, there are only very few rigorous results on the hard disk model. I will present a very recent result which can be interpreted as a lower bound on the variance of particle positions in terms of the size of the system. The result is obtained via a certain tansformation on particle configurations. It builds on an earlier result concerning the absence of positional order.

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Mini courses announcement: numerical approaches for SDE, Statistics and Finance [ Dr. Michele Bonollo - Iason Ltd ]
by Luca di persio 04 May '15

04 May '15

Dr. Michele Bonollo [ Iason Ltd. ] will give two mini courses on SDE and Statistics, both from an applicative/numerical point of view, at the Department of Computer Science of the University of Verona. The courses will be divided as follows - *24h * SDE, *8h* Statistics and they will be developed according to the following (tentative) calendar - Wed May 6 16.30-18-30 2 h - Mon May 11 14.30-18.30 4 h - Mon May 18 14.30-18.30 4 h (STAT) - Wed May 20 16.30-18.30 2 h - Mon May 25 14.30-18.30 4 h - Wed May 27 14.30-18.30 4 h (STAT) - Wed June 3 14.30-18.30 4 h - Mon June 8 14.30-18.30 4 h - Wed June 10 16.30-18.30 4h Covered topics will include SDE Topics - SDE and Closed form solutions: Black and Sholes model review - SDE Approximations: from the Eulero scheme to some higher order techniques. Weak and strong convergence definitions - The stochastic processes simulation - Discrete space and discrete state processes: the trees approaches versus the diffusion perspective - Some Brownian motion useful functionals: first hitting time, occupation time, - Application 1: Exotic derivative evaluation - Application 2: full evalution of VaR versus Delta-Gamma-Vega VaR - The compound Poisson process and the Operational VaR estimation STAT Topics - Parameter Estimation and Calibration review - Volatility surface: tricks and practical problems - Principal Component Analysis: applications to the term structure and to the volatility surface All the lessons will be given here https://goo.gl/maps/Yx2JU Strada le Grazie, 15 - 37134 Verona VR Ca' Vignal 2 and they will start in Room M. Do not hesitate to contact me for further details: luca.dipersio(a)univr.it __ Luca Di Persio - PhD assistant professor of Probability and Mathematical Finance Dept. Informatics University of Verona strada le Grazie 15 - 37134 Verona - Italy Tel : +39 045 802 7968 Dept. Math University of Trento V. Sommarive, 14 - 38123 Povo - Italy Tel : +39 0461 281686

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No Free Lunch Seminar by Prof. Massimiliano Caporin, Wed May 6 1:00 PM Aula Bianchi @ SNS
by Giacomo Bormetti 04 May '15

04 May '15

Dear all, Wednesday May 6 2015, 1:00 PM in Aula Bianchi, Scuola Normale Superiore Pisa Massimiliano Caporin Department of Economics and Management "Marco Fanno" - Università di Padova will deliver the seminar "The impact of network connectivity on factor exposures, asset pricing and portfolio diversification" Abstract: The need for understanding the propagation mechanisms behind the recent financial crises lead the increased interest for works associated with asset interconnections. In this framework, network-based methods have been used to infer from data the linkages between institutions. In this paper, we elaborate on this and make a step forward by introducing network linkages into linear factor models. Networks are used to infer the exogenous and contemporaneous links across assets, and impacts on several dimensions: network exposures act as in inflating factor for systematic exposure to common factors with implications for pricing; the power of diversication is reduced by the presence of network connections; in the presence of network links a misspecied traditional linear factor model provides residuals that are correlated and heteroskedastic. We support our claims with an extensive simulation experiment. Joint work with Monica Billio, Roberto Panzica, and Loriana Pelizzon. All interested people are kindly invited. Best, Giacomo -- Giacomo Bormetti Assistant Professor of Financial Mathematics -------------------------- Faculty of Mathematical and Natural Sciences Scuola Normale Superiore Pisa Piazza dei Cavalieri, 7 56126 Pisa - Italy email: giacomo.bormetti(a)sns.it http://mathfinance.sns.it/index.php/people/41-group-members/51-giacomo-borm… phone: +39 050 509248

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