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Seminario Lionel Levine (Cornell), Università La Sapienza
by Silvestri, Vittoria 16 Dec '19

16 Dec '19

PREANNUNCIO DI SEMINARIO (seguirà un reminder) Seminario di Probabilità Speaker: Lionel Levine (Cornell University) Title: Random walks with local memory Martedì 7 Gennaio, ore 14:00 (sharp) Aula di Consiglio Dipartimento di Matematica Università di Roma La Sapienza Piazzale Aldo Moro, 5 Abstract: The theme of this talk is walks in a random environment of "signposts" altered by the walker. I'll focus on three related examples: 1. Rotor walk on Z^2. Your initial signposts are independent with the uniform distribution on {North,East,South,West}. At each step you rotate the signpost at your current location clockwise 90 degrees and then follow it to a nearest neighbor. Priezzhev et al. conjectured that in n such steps you will visit order n^{2/3} distinct sites. I'll outline an elementary proof of a lower bound of this order. The upper bound, which is still open, is related to a famous question about the path of a light ray in a grid of randomly oriented mirrors. This part is joint work with Laura Florescu and Yuval Peres. 2. p-rotor walk on Z. In this walk you flip the signpost at your current location with probability 1-p and then follow it. I'll explain why your scaling limit will be a Brownian motion perturbed at its extrema. This part is joint work with Wilfried Huss and Ecaterina Sava-Huss. 3. p-rotor walk on Z^2. Rotate the signpost at your current location clockwise with probability p and counterclockwise with probability 1-p, and then follow it. This walk “organizes” its environment by destroying cycles of signposts. A native environment -- stationary in time, from your perspective as the walker -- is an orientation of the uniform spanning forest, plus one additional edge. This part is joint work with Swee Hong Chan, Lila Greco, and Peter Li: https://arxiv.org/abs/1809.04710 ******************************** Vittoria Silvestri Assistant Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ********************************

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Seminar at Scuola Normale Superiore, 17 December 2019, Luciano Campi
by Giulia Livieri 13 Dec '19

13 Dec '19

Dear all, On Tuesday, 17 December 2019 — at 11:30 — at the Scuola Normale Superiore (Room: Aula Bianchi Scienze) Prof. Luciano Campi (London School of Economics) will hold the following Seminar: Title : Correlated Equilibria and Mean Field Game Abstract: Mean field games are limit models for symmetric N-player games, as N tends to infinity, where the pre-limit models are solved in terms of Nash equilibria. A generalization of the notion of Nash equilibrium, due to Robert Aumann (1973, 1987), is that of a correlated equilibrium. Here, we discuss, in a simple non-static setting, the mean field game limit for correlated equilibria. We give a definition of correlated mean field game solution, prove that it arises as limit of N-player correlated equilibria in restricted (”open-loop”) Markov feedback strategies, and show how to construct approximate N-player equilibria starting from a correlated mean field game solution. We also compare our definition to the one by Lacker (2018) of weak solutions for mean field games without a common noise. (Joint work with Markus Fischer, Padova University) Fill free to forward this announcement to your colleagues. Best Giulia Livieri Assegnista di ricerca Scuola Normale Superiore Piazza dei Cavalieri, 7, 56126 Pisa PI room 65

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Doppio Seminario PELUCHETTI & KOWAL
by Pierpaolo De Blasi 13 Dec '19

13 Dec '19

Mercoledi 18 Dicembre 2019, presso il nuovo edificio del Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terranno i seguenti due seminari: ———————————————————————— ore 11.00 Stefano PELUCHETTI (Cogent Labs Tokyo) DEEP NEURAL NETWORKS AND STOCHASTIC PROCESSES We review deep neural networks and their training, and then focus on the connection between neural networks and stochastic processes. Deep neural networks at initialization correspond to prior models in function space, and under appropriate assumptions they converge to Gaussian processes in the limit of infinite width. While this connection holds "a priori", it is possible to derive similar results for "a posteriori" training via gradient descent. In this talk we discuss these and related results, and we introduce a recent line of research which generalizes established results to non-Gaussian initializations and stochastic processes arising in the limit of infinite depth. ———————————————————————— ore 12.00 Daniel KOWAL (Rice University) SCALABLE BAYESIAN INFERENCE AND SUMMARIZATION FOR FUNCYIONAL DATA Modern scientific monitoring systems, such as wearable and implantable devices, commonly record data over a continuous domain at high resolutions. These functional data are high-dimensional, strongly correlated, and usually measured concurrently with other variables of interest. Bayesians models for functional data are particularly appealing: they accommodate multiple dependence structures, handle missing or irregularly-spaced data, and provide regularization via shrinkage priors. However, these models are often complex, computationally intensive, and difficult to interpret. This talk will focus on two fundamental challenges for Bayesian functional data analysis: (1) constructing sufficiently flexible and scalable functional regression models and (2) extracting interpretable posterior summaries. The proposed modeling framework is nonparametric and uses an unknown functional basis to learn prominent functional features, which are associated with scalar predictors within a regression model. A customized projection-based Gibbs sampler provides posterior inference with linear time complexity in the number of predictors, which is empirically faster than existing frequentist and Bayesian alternatives. Using the posterior distribution, a decision theoretic approach for Bayesian variable selection is developed, which identifies a subset of covariates that retains nearly the predictive accuracy of the full model. The methodology is applied to actigraphy data to investigate the association between intraday physical activity and responses to a sleep questionnaire. ———————————————————————— Tutti gli interessati sono invitati a partecipare. Il seminario è organizzato dalla "de Castro" Statistics Initiative (www.carloalberto.org/stats <http://www.carloalberto.org/stats>) in collaborazione con il Collegio Carlo Alberto. Cordiali saluti, Pierpaolo De Blasi --- University of Torino & Collegio Carlo Alberto https://sites.google.com/a/carloalberto.org/pdeblasi/ <https://sites.google.com/a/carloalberto.org/pdeblasi/>

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XXIV Brazilian School of Probability/São Paulo School of advanced science
by Francesco Caravenna 13 Dec '19

13 Dec '19

Ricevo e inoltro. > Da: Dirk Erhard <erharddirk(a)gmail.com> > Oggetto: XXIV Brazilian School of Probability/São Paulo School of advanced science > Data: 12 dicembre 2019 20:22:34 CET > > First announcement : > > XXIV Brazilian School of Probability/ São Paulo School of advanced science on singular stochastic partial differential equations and their applications > > It is a pleasure to announce the XXIV Brazilian School of Probability/ São Paulo School of advanced science on singular stochastic partial differential equations and their applications. The São Paulo school is divided into two parts and will happen in the weeks of July 28 to August 8, 2020 at Campinas University. In the first week there will be two introductory mini courses (stochastic calculus and rough paths) that lay the foundations for the courses of the second week. In the latter ones newly developed theories and their latest developments in the field of singular SPDEs and related areas will be taught. The program will be complemented with several plenary talks, invited talks, a poster session and a visit to the LNLS laboratories, where the only particle accelerator of Latin America is located. The school will give full financial support for around 100 students (50 from Brazil and 50 from abroad). More informations under https://www.ime.unicamp.br/spas2020/ <https://www.ime.unicamp.br/spas2020/>. > > The XXIV Brazilian School of Probability will coincide with the second week of the São Paulo School. As in previous years, the XXIV Brazilian School of Probability will consist of two mini courses, plenary talks, contributed talks and poster sessions, all presented in a relaxed atmosphere. This will be our first edition at IMECC-UNICAMP, which is home to one of Brazil's top ranked Mathematics departments. More informations under https://www.ime.unicamp.br/bsp2020/ <https://www.ime.unicamp.br/bsp2020/>. > > > We would be grateful if you could advertise these events among your colleagues. > > On behalf of the organizing committee > > Dirk Erhard > Adriana Neumann > Christian Olivera

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Saint-Flour 2020 - First announcement
by Francesco Caravenna 13 Dec '19

13 Dec '19

Ricevo e inoltro. > Da: Saint-Flour Summer School <stflour(a)math.univ-bpclermont.fr> > Oggetto: Saint-Flour 2020 - First announcement > Data: 12 dicembre 2019 21:08:36 CET > A: saintflour(a)math.univ-bpclermont.fr > Rispondi a: Saint-Flour Summer School <stflour(a)math.univ-bpclermont.fr> > > SAINT-FLOUR 2020 - FIRST ANNOUNCEMENT > > Dear colleagues > > The 50th Saint-Flour Probability Summer School will be held on July 5-17, 2020. > > It is supported by the Université Clermont Auvergne and Centre National de la Recherche Scientifique. > > This year, the three courses will be: > > Ivan Corwin: Integrable probability and Gibbsian line ensembles > Sylvie Méléard: The interplay between scales in mathematical modeling for ecology and evolution > Allan Sly: Random Constraint Satisfaction Problems > Further information can be found on the conference website and YouTube channel: > > http://recherche.math.univ-bpclermont.fr/stflour/stflour-en.php <http://recherche.math.univ-bpclermont.fr/stflour/stflour-en.php> > https://www.youtube.com/channel/UC640PtwmkBnrhCdop2daETw <https://www.youtube.com/channel/UC640PtwmkBnrhCdop2daETw> > > Online registration will open in march. You will receive another announcement at that time. > > Please give the information to anyone else who might be interested. > > Best regards, > > The organizing committee > > Christophe Bahadoran, Hacène Djellout, Arnaud Guillin > > ------------------------------------------------- > > Laboratoire de Mathématiques Blaise Pascal, CNRS UMR 6620 > Université Clermont-Auvergne, Campus des Cézeaux > 3, place Vasarely > TSA 60026 CS 60026 > 63178 Aubière cedex, France > > Tel: +33 (0)4 73 40 70 50 > Fax: +33 (0)4 73 40 54 50 > > mailto:stflour@math.univ-bpclermont.fr <mailto:stflour@math.univ-bpclermont.fr>

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Energy Finance Italia: deadline approaching + YITP grants for young researchers
by Tiziano Vargiolu 12 Dec '19

12 Dec '19

Dear All, we wish to remind that the deadline for paper submissions for the fifth edition of the Energy Finance Italia Workshop - EFI5, which will be held in Rome, University of Roma Tre, next February 10-11, 2020 http://host.uniroma3.it/eventi/efi5/ is rapidly approaching (Sunday, December 15). We also want to advertise that, for the 3rd consecutive year, we are applying for the Young Investigator Training Program of the ACRI (Associazione Casse di Risparmio Italiane). If funded (as in the previous 2 editions), we will grant several 1-month positions to young researchers, coming from outside Italy, to spend in one Italian research institution of the network. In order to be eligible, the young researcher should submit a presentation to the workshop, and choose at least three research institutions to spend their grant at. All those interested in such positions are kindly asked to submit an extended abstract to the workshop (see http://host.uniroma3.it/eventi/efi5/) and to contact me (vargiolu(a)math.unipd.it), in order to have more precise details on the official procedure. Best regards Tiziano -------------------------------------------------------------------------- Tiziano Vargiolu Dipartimento di Matematica Phone: +39 049 8271383 Universita' di Padova Fax: +39 049 8271428 Via Trieste, 63 E-mail: vargiolu(a)math.unipd.it I-35121 Padova (Italy) WWW: http://www.math.unipd.it/~vargiolu --------------------------------------------------------------------------

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Seminari di H.A.Mimun e G. Panizo a Roma, Univ. La Sapienza
by Faggionato, Alessandra 11 Dec '19

11 Dec '19

Buongiorno sotto trovate l'annuncio per due seminari che si terranno al Dipartimento di Matematica dell'Università La Sapienza a Roma la prossima settimana. grazie saluti alessandra ****************************************************************************************** *When*: Monday 16 December, 16:00 *Where*: Room B, Department of Mathematics, Sapienza University, Rome. *Speaker*: H.A. Mimun (Department of Mathematics, Sapienza University, Rome) *Title:* Percolation in the Miller-Abrahams random resistor network *Abstract: *The Miller-Abrahams random resistor network is used to study electron transport in amorphous solids. This resistor network is given by the complete random graph built on a marked homogeneous Poisson point process on R^d and each edge {x,y} is associated to a filament with conductance depending on the temperature, the distance between the points x,y and their associated marks. In this talk we consider the subgraph containing only edges with lower bounded conductances and, using the method of randomized algorithms developed by Duminil-Copin et al. and the renormalization argument proposed by Grimmett and Marstrand, we analyze the connection probabilities and the left-right crossings in appropriate regimes. These percolation properties are key ingredients for understanding the asymptotic behavior at low temperature of the effective conductivity of the Miller-Abrahams random resistor network. Joint work with Alessandra Faggionato (Sapienza University, Rome). ****************************************************************************************** *When*: Tuesday 17 December, 14:00 (sharp!) *Where:* Sala di Consiglio, Department of Mathematics, Sapienza University, Rome. *Speaker: *Gonzalo Panizo Garcia, IMCA, Lima, Perù *Title:* A self-interacting random walk *Abstract:* In 2011, Benjamini, Kozma and Schapira introduced a “balanced excited random walk” in the 4-dimensional lattice. In 2016, a similar model was studied by Peres, Schapira and Sousi in the 3-dimensional lattice. Here we generalize their constructions in the d-dimensional lattice, in the following way: if the walk visits a site for the first time, it makes a simple random walk step in the first d_1 dimensions, whereas if the site has been already visited, it makes a simple random walk step in the last d_2 coordinates. Both BKS and PSS proved transience in the non-overlapping case d=d_1+d_2, with d_1=d_2=4 (BKS) and d_1=1, d_2=3 (PSS). In this talk some result for the overlapping case (d_1+d_2>d) will be presented, in particular for d=4, d_1=2 and d_2=3. (Joint work with D. Camarena and A. Ramirez). -- ************************************************* 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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Workshop Junior Female Researchers in Probability, 17.-19. June 2020
by Luisa Andreis 11 Dec '19

11 Dec '19

Dear colleagues, we would like to draw your attention to the third conference for "Junior female researchers in probability" in Berlin, 17.-19. June 2020. The aim of this workshop is to promote young female researchers by giving them an opportunity to present their own work, and hear distinguished mathematicians who can inspire them to pursue a fulfilling career in probability. Keynote spekaers: Martina Hofmanova (Bielefeld) Nina Gantert (TU München) Invited speakers: Sigrid Källblad (Stockholm) Annika Lang (Göteborg) Elena Pulvirenti (Bonn) Maite Wilke Berenguer (Bochum) Female participants are invited to submit abstracts for contributed talks, and may apply for financial support. There are special travel grants for female master students interested in gaining some insight into research and get in touch with researchers. Of course participation of men is very welcome, but presentations and financial support are reserved for women. Please pass this information on to interested master students, PhD students and postdocs as well as your colleagues! More details can be found on our website: https://www.wias-berlin.de/workshops/JFRP20/ <https://www.wias-berlin.de/workshops/JFRP20/> Best regards, Luisa Andreis, Peter Bank, Dörte Kreher and Noemi Kurt IRTG 2544 Stochastic Analysis in Interaction, Berlin-Oxford

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4 postdoctoral positions in Mathematics, Computer Science and interactions in Lyon & Saint-Étienne: 2020 campaign Labex Milyon
by Pietro Caputo 11 Dec '19

11 Dec '19

ricevo e inoltro: ---------- Forwarded message --------- From: Christophe SABOT <sabot(a)math.univ-lyon1.fr> Date: Mon, Dec 9, 2019 at 2:33 PM Subject: 4 postdoctoral positions in Mathematics, Computer Science and interactions in Lyon & Saint-Étienne: 2020 campaign Labex Milyon Dear Colleagues, Please forward this message to interested colleagues and potential candidates. Best regards, Christophe Sabot Responsible of the Labex Milyon ----------------------------------------------------------------------------------------------------------------------------- The Excellence Laboratory Milyon <http://milyon.universite-lyon.fr> (Labex Milyon) opens the 2020 campaign of postdoctoral researchers in Lyon--Saint-Etienne in Mathematics, Computer Science and their interactions (including some aspects of theoretical physics). *Milyon offers four postdoctoral positions of two years* with no teaching load for the period 2020–2022. The application is open to all research areas of the labex Milyon (see here <https://milyon.universite-lyon.fr/about-research-126697.kjsp?RH=EN-MILYON-9…> ). More information on the link below: https://milyon.universite-lyon.fr/postdoctoral-positions-2020-2022--130160.… Deadline: January 7th 2020 ------------------------------------------------------------------------------------------------------------------------------

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Winter school in Leeds (13-17 January 2020)
by Tiziano De Angelis 09 Dec '19

09 Dec '19

Dear All, Just a kind reminder that registration for the winter school+workshop at the link below will close on the 15th of December. https://conferences.leeds.ac.uk/osfbp/ Best wishes Tiziano Sent from my iPhone

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