Random June 2019

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25 participants
30 discussions

seminario Drivas a Pisa
by Marco Romito 09 Jun '19

09 Jun '19

dear all this is to announce that Theodore Drivas (Princeton University) will give a talk on *next Wednesday, June 12* at 11am in Sala Seminari, Dipartimento di Matematica, Università di Pisa (largo B. Pontecorvo 5, 56127 Pisa). cheers m. *Title*: /Spontaneously stochastic solutions in dynamical systems with singularities/ *Abstract*: We consider a class of dynamical systems described by ordinary differential equations with an isolated singularity, where the singularity is characterized by the lack of Lipschitz continuity. Singularities are common in applications both for ODEs (e.g., particles collisions) and PDEs (e.g., finite-time blowup in fluid models). The fundamental obstacle is that solutions cannot be continued past the singularity uniquely: typically, there are infinitely many solutions. The conventional way to proceed is to define a regularization limit, such as vanishing viscosity or noise. It turns out that there are structurally stable situations when such a limit is not sensitive to a particular form of the regularization. This is explained by the analysis of attractors for the rescaled (non-singular) dynamical system and their ergodic properties. What is even more surprising is that solutions in this limit may become probabilistic (spontaneously stochastic) with the unique probability measure past the singularity. We will present rigorous results and discuss applications of this phenomenon.

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Seminario di Peter Parczewski a Bologna
by Alberto Lanconelli 08 Jun '19

08 Jun '19

Statistics Seminars 2019 Martedì 11 Giugno 2019 ore 14,30 Aula III, secondo piano, Dipartimento di Scienze Statistiche "Optimal approximation of (anticipating) SDEs" Dott. Peter Parczewski, Mannheim University Abstract We present a general mean squared error expansion for optimal approximation of Wiener functionals based on finite and equidistant observations of the Brownian motion.The expansion is given in terms of Malliavin calculus and the terms involved exhibit Hilbert space structures. This gives lower error bounds for arbitrary numerical schemes which are constructed from an equidistant information of the Brownian motion. Due to this expansion we are able to recover and improve many results on optimal approximation of Ito SDEs and anticipating SDEs, where the integral is interpreted in Skorohod sense, a mean zero extension of the Ito integral to nonadapted integrands. 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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Scholarships for Events on Complex Systems
by Mateusz Wilinski 07 Jun '19

07 Jun '19

We are happy to announce that the Scholarships for Events on Complex Systems (SECS) are back! They are dedicated to young researchers from Complex Systems Society, who need funds to attend complex systems related events. More information at: yrcss.cssociety.org/secs/ <https://l.facebook.com/l.php?u=http%3A%2F%2Fyrcss.cssociety.org%2Fsecs%2F%3…> Best wishes, on behalf of the YRCSS Advisory Board Mateusz Wilinski

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Seminario Gubinelli Politecnico di Torino, 12 giugno ore 15
by Enrico Bibbona 07 Jun '19

07 Jun '19

Gentili Colleghi, vi giro la pubblicità di un seminario di Massimiliano Gubinelli che si terrà qui al Politecnico di Torino mercoledì 12 giugno alle 15. http://www.politocomunica.polito.it/events/appuntamenti/(idnews)/13214 Cordiali saluti, Enrico Bibbona Enrico Bibbona Probability, Statistics and Optimization group Department of Mathematical Sciences "G. L Lagrange" Politecnico di Torino Caro Enrico, Volevo segnalarti questo seminario su Stochastic PDEs: http://www.politocomunica.polito.it/events/appuntamenti/(idnews)/13214 E’ gia’ stato mandato l’avviso dal Dipartimento ma, sai, ne riceviamo tanti e puo’ sfuggire. Gubinelli e’ una massima autorità in materia (piu’ di 2000 citazioni, lavori su Inventiones, J. Amer. Math. Soc., Comm. Pure Appl. Math., etc.) e forse puo’ interessare anche altri colleghi della tua area. Grazie, ciao, Fabio

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Seminario di Probabilita' a Roma Tre martedi 11-06-19
by Pietro Caputo 07 Jun '19

07 Jun '19

Speaker: Alexandre Gaudilliere (CNRS Marseille, France) Martedi' 11 Giugno 2019 ORE 14:30 Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre Largo San Leonardo Murialdo,1 - Pal.C - Aula 211 Titolo: Random forests and Markovian spectra Abstract: Starting from a theorem of Michelli and Willoughby we will see how some loop-erased random walk make a bridge between the spanning forest of a graph and the spectrum of its Laplacian. We will give more examples of the links between these two sets, introducing in particular a fragmentation and coalescence process that allows for the study of this spectrum from a probabilistic point of view.

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Bando RTD A - SECS S06 Metodi matematici dell'economia e delle scienze attuariali e finanziarie - Università di FIRENZE
by Maria Elvira Mancino 07 Jun '19

07 Jun '19

Bando Ricercatore art. 24, comma 3, lett. a) Decreto rettorale, 17 aprile 2019, n. 476 (prot. 71903) pubblicato all'Albo Ufficiale (n. 5533) dal 15 maggio al 13 giugno 2019 Avviso pubblicato in G.U. - 4° Serie Speciale – Concorsi ed esami, n. 38 del 14 maggio 2019 scadenza per la presentazione delle domande: 13 giugno 2019 13/D4 - Metodi matematici dell'economia e delle scienze attuariali e finanziarie Settore scientifico disciplinare SECS-S/06 https://www.unifi.it/cmpro-v-p-11560.html

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Seminario GHOSHAL
by Matteo Ruggiero 07 Jun '19

07 Jun '19

STATISTICS SEMINARS @ COLLEGIO CARLO ALBERTO Venerdì 14 Giugno 2019, alle ore 12:00, presso il nuovo edificio del Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terrà il seguente seminario: ------------------------------------------------ Subhashis GHOSHAL (North Carolina State University) POSTERIOR CONTRACTION AND CREDIBLE SETS FOR FILAMENTS OF REGRESSION FUNCTIONS The filament of a smooth function f consists of local maximizers of f when moving in a certain direction. The filament is an important geometrical feature of the surface of the graph of a function. It is also considered as an important lower dimensional summary in analyzing multivariate data. There have been some recent theoretical studies on estimating filaments of a density function using a nonparametric kernel density estimator. In this talk, we consider a Bayesian approach and concentrate on the nonparametric regression problem. We study the posterior contraction rates for filaments using a finite random series of B-splines prior on the regression function. Compared with the kernel method, this has the advantage that the bias can be better controlled when the function is smoother, which allows obtaining better rates. Under an isotropic Holder smoothness condition, we obtain the posterior contraction rate for the filament under two different metrics — a distance of separation along an integral curve, and the Hausdorff distance between sets. Moreover, we construct credible sets of optimal size for the filament with sufficient frequentist coverage. We study the performance of our proposed method through a simulation study and apply on a dataset on California earthquakes to assess the fault-line of the maximum local earthquake intensity. ------------------------------------------------ Tutti gli interessati sono invitati a partecipare. Il seminario è organizzato dalla "de Castro" Statistics Initiative (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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Reminder - Talk by Vlad Bally in Rome
by Anna Vidotto 06 Jun '19

06 Jun '19

Dear all, I would like to remind the following talk that will be held tomorrow at the Department of Mathematics, University of Rome Tor Vergata. Vlad Bally (Université Paris-Est) - 07/06/19 - 4:30 PM - Aula D'Antoni Convergence in Distribution Norms in the CLT and Application to Trigonometric Polynomials Abstract: Under some regularity condition on the random variables at hand, we prove convergence in distribution norms in the CLT and we also derive some local developments (Edgeworth expansions). We use these results in order to study the asymptotic behavior of the number of roots of trigonometric polynomials with random coefficients. — This talk is part of the activity of the MIUR Excellence Department Project CUP E83C18000100006 — Kind regards, Anna Vidotto --------- Anna Vidotto PostDoc Researcher Dipartimento di Matematica Università degli Studi di Roma Tor Vergata https://sites.google.com/view/annavidotto

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Summer school and workshop on Quantum Transport and Universality - Roma, Sept 2019 - 3rd announcement
by A. Giuliani 03 Jun '19

03 Jun '19

Dear colleague, this is the third announcement of the summer school and workshop on "Quantum Transport and Universality - From Topological Materials to Quantum Hydrodynamics", to be held at the Univ. Roma Tre on September 16-20, 2019 (school) and at the Accademia Nazionale dei Lincei, Roma, on September 23-25, 2019 (workshop). For the list of confirmed speakers, see below. Further details, including the poster and the registration form, can be found on the webpage: http://www.mat.uniroma3.it/users/giuliani/public_html/QTU2019/pagine_sito/i… REGISTRATION is free but mandatory. All participants are kindly asked to register before **JUNE 23, 2019** CONTRIBUTED TALKS: During the summer school, we plan to have a session of contributed talks. Interested contributors are invited to register and send via email at tlongo(a)mat.uniroma3.it the title and abstract of their proposed talk, together with their CV, by **JUNE 23, 2019** ACCOMMODATION: September is high season in Rome. We invite all the interested participants to reserve an accommodation well in advance. A list of a few solutions with special rates that have been negotiated for the school and conference can be found on the website, under the link `Accommodation'. If you need additional information, please contact us via email at tlongo(a)mat.uniroma3.it. We would be grateful if you could circulate this announcement among your students, postdocs and collegues. With my best regards, Alessandro Giuliani for the organizing committe (C. Di Castro, G. Gallavotti, A. Giuliani, R. Greenblatt, G. Jona-Lasinio, V. Mastropietro, D. Monaco, R. Raimondi) %%% LIST OF CONFIRMED SPEAKERS %%% SCHOOL: B. Doyon, G. M. Graf, T. Prosen, M. Porta; WORKSHOP: A. Burkov, P. Calabrese, H. Cornean, W. De Roeck, M. Fagotti, J. Frohlich, J. Garrahan, K. Gawedzki, I. Herbut, J. Imbrie, J. Lebowitz, A. H. MacDonald, V. Mastropietro, G. Panati, A. Scardicchio, H. Spohn, M. A. H. Vozmediano, X. Zotos.

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Summer School in Bonn 23-27 September
by Giuseppe Cannizzaro 01 Jun '19

01 Jun '19

Buongiorno, Con la speranza della massima diffusione, specialmente per dottorandi ma anche ricercatori e professori, ci tenevo ad informarvi che stiamo organizzando una *Summer School* dal titolo "*New frontiers in Singular SPDEs and Scaling Limit*" presso il *Hausdorff Institute di Bonn* tra il *23 e il 27 Settembre 2019*. La scuola sarà composta da 4 minicorsi di - Tadahiro Oh (University of Edinburgh) - Felix Otto (Max Planck Institute Leipzig) - Fabio Toninelli (Université Claude Bernard Lyon 1) - Nikolaos Zygouras (University of Warwick) Per maggiori informazioni e registrazione online, potete consultare il sito http://www.him.uni-bonn.de/en/programs/future-programs/future-junior-trimes… Per domande ulteriori, sono a disposizione all'indirizzo giuseppe.cannizzaro(a)warwick.ac.uk Con la speranza di accogliervi numerosi, Distinti Saluti, Giuseppe Cannizzaro

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