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Webinar in Statistics ANDREA OTTOLINI - 19/3, ore 17
by Pierpaolo De Blasi 12 Mar '21

12 Mar '21

WEBINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.carloalberto.org/events/category/seminars/seminars-in-statistic…> Venerdi 19 Marzo 2021, alle ore 17:00, si terrà il seguente webinar: ------------------------------------------------ Speaker: *Andrea Ottolini (*Standford University, USA) Title: *Gibbs sampling in the analysis of priors for almost exchangeable data* Zoom link: https://us02web.zoom.us/j/83130864007?pwd=Z2dGbHVsWHJMMG9iaTJFb2VMcExqQT09 Meeting ID: 831 3086 4007 Passcode: 222589 Abstract: Consider a population of N individuals divided into d subgroups (e.g., d=4 and people are divided by sex and smoking habits). A sequence of 0-1 valued experiments on the population with outcomes X_1,..., X_n is called partially exchangeable if the only relevant information in the data is the number of 1's in each category. de Finetti's representation result guarantees that the distribution of the X's (for n<<N) is in bijection with measures pi^{(n)} on [0,1]^d. Natural problems -- such as understanding which of the subdivisions are truly meaningful and what is the effect of our initial belief pi^{(0)} -- can be addressed if one knows how to sample efficiently from these measures. In the absence of further information about the experiments, de Finetti suggests starting with a class of priors pi^{(0)}_{C,A} indexed by a d-dimensional network (measuring the relative differences among categories) and a positive parameter A (measuring the belief in complete exchangeability). in this talk I will analyze the performance of Gibbs sampling in approximating these measures in the almost exchangeable regime (A>>1). It will be shown that A^2 steps are necessary and sufficient to mix in a certain Wasserstein distance, with constants depending on few spectral parameters of the network C. This is based on joint work with Gerencsér. ------------------------------------------------ Il webinar è organizzato dalla "de Castro" Statistics Initiative www.carloalberto.org/stats in collaborazione con il Collegio Carlo Alberto e rientra nel Complex Data Modeling Research Network midas.mat.uc.cl/network Cordiali saluti, Pierpaolo De Blasi --- University of Torino & Collegio Carlo Alberto carloalberto.org/pdeblasi <https://sites.google.com/a/carloalberto.org/pdeblasi/>

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Fwd: Pubblicazione bando RTDb SSD MAT/06
by Lucia Caramellino 12 Mar '21

12 Mar '21

Ricevo ed inoltro. Buona giornata, Lucia +++++++++++++++++++++++++++++++++ Lucia Caramellino Dipartimento di Matematica Università di Roma “Tor Vergata” Web: http://www.mat.uniroma2.it/~caramell > Inizio messaggio inoltrato: > > Da: Filippo Bracci <fbracci(a)mat.uniroma2.it> > Oggetto: Pubblicazione bando RTDb Piano straordinario SSD MAT/06 Rif 1644 > Data: 3 marzo 2021 13:49:19 CET > A: Docenti <docenti(a)mat.uniroma2.it> > > Carissimi, > > è uscito il bando rtdB MAT/06 (con profilo per analisi dati): > > http://web.uniroma2.it/module/name/Content/newlang/italiano/action/showpage… <http://web.uniroma2.it/module/name/Content/newlang/italiano/action/showpage…> > > Scadenza: 01/04/2021 > > Vi prego di darne pubblicità > > grazie > > a presto > > Filippo > -- > ************************ > Prof. Filippo Bracci > Dipartimento di Matematica > Universita' di Roma "Tor Vergata" > Via della Ricerca Scientifica 1 > 00133 Roma - ITALIA > Tel: (+39-)06-7259 4643/4105 > Fax: (+39-)06-7259 4699 > E-mail: fbracci(a)mat.uniroma2.it <mailto:fbracci@mat.uniroma2.it> > Web-page: www.mat.uniroma2.it/~fbracci <http://www.mat.uniroma2.it/~fbracci> > >

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Seminar announcement
by Marco Scarsini 12 Mar '21

12 Mar '21

*Thursday, 18 March, 17:00 CET* *Simina Brânzei**, *Purdue University Searching, Sorting and Cake Cutting in Rounds <http://mailsender.luiss.it/lists/lt.php?id=cRpQAQMFSAUEAQZOVgFdBQs> Discussants: Alexandros Hollender and Argyrios Deligkas The paper can be found here <https://arxiv.org/abs/2012.00738>. This is the link to the Virtual Room <https://luiss.webex.com/webappng/sites/luiss/meeting/download/1e89e3ce671e4…> The schedule of the upcoming seminars can be found here <https://economiaefinanza.luiss.it/en/seminari/seminari-2021>. If you want to receive announcements of future seminars, please fill out this form <https://docs.google.com/forms/d/e/1FAIpQLSeDxM-M5ogG43elgjC-lNCp0BDhISiZHG0…> . ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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Corso online del prof. Zegarlinski su "Coercive Inequalities"
by Federico Girotti 12 Mar '21

12 Mar '21

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Posto da Ricercatore di tipo B a Udine (fwd)
by Tiziano Vargiolu 10 Mar '21

10 Mar '21

---------- Forwarded message ---------- Date: Wed, 10 Mar 2021 16:37:26 +0100 From: Marcellino Gaudenzi <marcellino.gaudenzi(a)uniud.it> To: vargiolu(a)math.unipd.it Subject: Posto da Ricercatore di tipo B a Udine Caro Tiziano, ti chiedo gentilmente di rendere noto che l'Universit? di Udine ha bandito un posto da ricercatore di tipo B per il settore concorsuale 13/D4 Metodi matematici dell'economia e delle scienze attuariali e finanziarie, presso il Dipartimento di Scienze Economiche e Statistiche. Il bando ? reperibile all'indirizzo: https://www.uniud.it/it/ateneo-uniud/concorsi-bandi-uniud/concorsi/bandi-do… Grazie. Cari saluti Marcellino ________________________ Marcellino Gaudenzi Professore di Metodi matematici dell'economia e delle scienze attuariali e f inanziarie Universit? di Udine Dipartimento di Scienze Economiche e Statistiche Via Tomadini 30/A - 33100 Udine, Italy

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Announcement: Online conference Stochastic Processes and their Friends, the 18th and 19th of March 2021 (fwd)
by Tiziano Vargiolu 10 Mar '21

10 Mar '21

---------- Forwarded message ---------- Date: Tue, 9 Mar 2021 20:11:48 +0000 (UTC) From: Miryana Grigorova <miryana_grigorova(a)yahoo.fr> To: Tiziano Vargiolu <vargiolu(a)math.unipd.it> Subject: Announcement: Online conference Stochastic Processes and their Friends, the 18th and 19th of March 2021 ---------------------------------------------------------------------------- Dear colleagues and friends, It is with the greatest of pleasure that we invite you to take part in the online conference Stochastic Processes and their Friends. This first edition of the conference celebrates the scientific career of Prof. Alexander Yu. Veretennikov. The event will take place online via Zoom in the afternoons of the 18th and 19th of March. More information can be found at https://www.miryanagrigorova.com/stochastic-processes-and-their-frie Please to register by following this link https://www.eventbrite.co.uk/e/special-online-event-stochastic-processes-an… Registration is free but required for organisational purposes. We are looking forward to seeing you next week! On behalf of the organising committee, Yours sincerely, Miryana

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Fwd: [owps] One World Probability Seminar Thursday March 11, 2021
by Faggionato, Alessandra 10 Mar '21

10 Mar '21

Buongiorno inoltro l'annuncio per il OWPS di domani, che sarà relazionato alla biologia. Saluti Alessandra ---------- Forwarded message --------- Da: One World Probability <ow.probability(a)gmail.com> Date: mer 10 mar 2021 alle ore 09:32 Subject: [owps] One World Probability Seminar Thursday March 11, 2021 To: <owps(a)lists.bath.ac.uk> Tomorrow's speakers in the One World Probability Seminar are (Note: all times are in UTC. *Due to time changes, you should check what that translates to in your location*) ------------------------------------------------ (14:00-15:00 UTC) Speaker: Viet Chi Tran (Université Gustave Eiffel) Title: Limit Theorems for Historical Particle Systems Abstract: To describe the evolving phylogenies of a birth and death process with trait structure and ecological interactions, we build a historical process inspired by works by Dawson and Perkins (1991 and 1995): it is a càdlàg process whose value at time t is a measure on lineages stopped at this time, i.e. paths describing the trait ancestries of the individuals living at time t. The dynamics may depend on past traits and allows interactions between individuals through their lineages. We establish the convergence of the individual-based birth-death process to a nonlinear historical superprocess, under the assumptions of large populations, small individuals and allometric demographies. The limit is described here by a macroscopic martingale problem. Because of the interactions, the branching property fails and we use fine couplings between our population and independent branching particles. This is a joint work with Sylvie Méléard. (15:00-16:00 UTC) Speaker: Sylvie Méléard (École Polytechnique, Paris) Title: Historical Processes and Dynamics of Phylogenies in a Population with Climate Change Abstract: We investigate in a simple model how the phylogenies of living individuals are shaped by the adaptation to a varying environment. In this model, the individuals are characterised by one-dimensional real traits (or positions). The stochastic individual-based birth-death process depends on a time-changing growth rate that shifts the optimal trait to the right and depends on a nonlinear logistic competition term. The macroscopic behaviour is described by a PDE that admits a unique positive stationary solution. We are interested here in the ancestral lineages of the living individuals in the stationary regime. The dynamic of these lineages is modelled by a historical process, approximatively close to a similar one with non-linearity frozen to its stationary value. We then use a many-to-one identity together with Feynman-Kac's formula and fine stochastic calculus to completely describe the limiting distribution, in large populations, of the path of an individual drawn at random at a given time. This path, in reversed time, is approximated by a simple Ornstein-Uhlenbeck. It shows how the lagged bulk of the present population stems from ancestors once optimal in trait but still in the tail of the trait distribution in which they lived. This talk is based on a joint work with Vincent Calvez, Benoit Henry and Viet Chi Tran. ------------------------------------------------ The zoom link will appear the day before on the OWPS website: https://www.owprobability.org/one-world-probability-seminar <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.owpro…> It can also be directly accessed through the link below: https://uniroma1.zoom.us/j/86028841260?pwd=bUxyVUYzSjY5dDR4d3krb2lDTHZDQT09 <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Funiroma1.…> Meeting-ID: 860 2884 1260 Passcode: 868252 Please feel free to circulate this email. We hope to see you all tomorrow! One World Probability Team -- ************************************************* 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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Fwd: [umr8050] Allocations de Master Bézout : ouverture de la nouvelle campagne de recrutement
by Lucia Caramellino 09 Mar '21

09 Mar '21

Ricevo ed inoltro. Buona giornata, Lucia +++++++++++++++++++++++++++++++++ Lucia Caramellino Dipartimento di Matematica Università di Roma “Tor Vergata” Web: http://www.mat.uniroma2.it/~caramell De: "raphael danchin" <raphael.danchin(a)u-pec.fr <mailto:raphael.danchin@u-pec.fr>> À: "umr8050" <umr8050(a)listes.math.cnrs.fr <mailto:umr8050@listes.math.cnrs.fr>> Envoyé: Mardi 9 Mars 2021 08:51:51 Objet: [umr8050] Allocations de Master Bézout : ouverture de la nouvelle campagne de recrutement Dear colleague, The 2021-2022 hiring campaign for international Bézout master's scholarships is open until May 21. This year, we will be able to accept more applications than usual (about 10, compared to 7 usually). Bézout Master program is directed towards excellent students in mathematics or computer science (or both) from foreign institutions willing to pursue their studies in Université Paris-Est at the master's level. The laureates will receive about 1300 € per month over 11 months (pending approval of the University Executive Board) and will be proposed a room on the campus. Furthermore, the best students will then be invited to join the PhD program of the Doctoral School MSTIC (Mathematics, Sciences and Information and Communication Technology). A joint supervision with the student's national doctoral framework, leading to both PhD grades, is possible. The details of the program can be found here: http://bezout.univ-paris-est.fr/masters-scholarships/ <http://bezout.univ-paris-est.fr/masters-scholarships/> . From the same webpage, a link to the application form is available; the deadline will be May 21. On April 27 and 30, we plan to hold two online presentations of the Bézout master's program and scholarships, followed by a session of questions and answers; potential applicants should express their interest (without commitment to attend), so that we can send them the credentials for the meeting; see the webpage. A description of the activities of the Bézout Labex can be found in the leaflet at http://bezout.univ-paris-est.fr/wp-content/uploads/2020/11/bezout-leaflet.p…. One can also send you a few printed leaflets at your postal address. Contact: Raphaël Danchin <danchin(a)u-pec.fr <mailto:danchin@u-pec.fr>>

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Webinar Yi Yu @Bocconi
by Giacomo Zanella 09 Mar '21

09 Mar '21

We announce the following DEC Statistics webinar: Date: Thursday, March 11, h17:00 (Italy time) Speaker: Yi Yu (University of Warwick) Title: Functional Linear Regression with Mixed Predictors Abstract: We study a functional linear regression model that deals with functional responses and allows for both functional covariates and high-dimensional vector covariates. The proposed model is flexible and nests several functional regression models in the literature as special cases. Based on the theory of reproducing kernel Hilbert spaces (RKHS), we propose a penalized least squares estimator that can accommodate functional variables observed on discrete grids. Besides the conventional smoothness penalties, a group Lasso-type penalty is further imposed to induce sparsity in the high-dimensional vector predictors. We derive finite sample theoretical guarantees and show that the excess prediction risk of our estimator is minimax optimal. Furthermore, our analysis reveals an interesting phase transition phenomenon that the optimal excess risk is determined jointly by the smoothness and the sparsity of the functional regression coefficients. A novel efficient optimization algorithm based on iterative coordinate descent is devised to handle the smoothness and sparsity penalties simultaneously. Simulation studies and real data applications illustrate the promising performance of the proposed approach compared to the state-of-the-art methods in the literature. The webinar will be on zoom at: https://zoom.us/j/95651583993?pwd=ZnZjaGxvZWVLdGFSL0dGTk43eU9Idz09 Meeting ID: 956 5158 3993 Passcode: 568279 Kind regards, Giacomo Zanella

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Seminario di Sandra Cerrai in Bicocca (circa)
by Gianmario Tessitore - UNIMIB 08 Mar '21

08 Mar '21

Ho il piacere di annunciare il seguente seminario, da remoto, di Sandra Cerrai (University of Maryland): "Sull'approssimazione di Smoluchowski-Kramers per SPDE con termine di smorzamento variabile" Lunedì 15 Marzo 2021 ore 17:30 Seguono il riassunto e il link Zoom. Tutti gli interessati sono invitati a partecipare. Gianmario Tessitore %%%%%%%%%%%%%%%%%%%%%%%%%%%% Link Zoom: https://us02web.zoom.us/j/81619958846?pwd=V1BQemR1L01aMzJHMGVFOWg1WVR3UT09 (ID: 816 1995 8846 Passcode: 133769) Abstract: Darò una panoramica su una serie di risultati sul comportamento asintotico, rispetto alla massa piccola, di sistemi stocastici infinito-dimensionali descritti da equazioni delle onde smorzate perturbate da un rumore Gaussiano. In particolare, concentrerò la mia attenzione al caso in cui lo smorzamento dipende dallo stato. %%%%%%%%%%%%%%%%%%%%%%%%%%%% -- Gianmario Tessitore Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca

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