September 2019 - Random - Mailing list — Dipartimento di Matematica, UniPI

Seminario di Lorenzo Taggi a Roma 1
by Faggionato, Alessandra 24 Sep '19

24 Sep '19

Buongiorno il Dr. Lorenzo Taggi (WIAS - Berlino) terrà il seguente seminario Martedi' 1 Ottobre alle ore 14 in Aula di Consiglio del Dipartimento di Matematica alla Sapienza: *Title:* Absorbing-state phase transition in Activated Random Walk and Oil and Water. *Abstract:* We consider two interacting particle systems, Activated Random Walk and Oil and Water, which belong to the so-called class of Abelian networks. In these systems particles of two different types are present and the dynamics conserves the number of particles. This conservation law introduces hard-core constraints and long-range correlations which make the rigorous mathematical analysis particularly challenging. Activated Random Walk undergoes an absorbing-state phase transition, namely if the particle density is small enough, the activity dies out with time, while if the particle density is large enough, the activity is sustained. In recent years significant effort has been made to provide a rigorous proof of the occurrence of such a phase transition and a non-trivial characterisation of the critical particle density. Oil and Water shows a substantially different behaviour from Activated Random Walks and other Abelian networks: the activity dies out with time at *all *densities for *any *graph which is vertex-transitive. This talk reviews the main questions, results and conjectures about these models and presents joint works with E. Candellero and A. Stauffer. saluti alessandra ************************************************* 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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seminario Samuel Cohen in Bicocca
by Emanuela Rosazza 24 Sep '19

24 Sep '19

Si avvisa che il giorno martedì 1 ottobre alle ore 16 presso l’Università di Milano- Bicocca (via degli Arcimboldi 8 - edificio U7, quarto piano- aula 4026) si terrà il seguente seminario: Speaker: Samuel Cohen (University of Oxford) Titolo: “Learning and filtering in an uncertain setting” Abstract: Optimal filtering is a classical method for inferring the distribution of a hidden process from data. As an input it requires a probability model, which needs to be separately estimated. In this talk, we will look at what happens when we include the uncertainty of this estimation into our filtering problem, using a nonlinear expectation approach. A key difficulty is that one obtains a pathwise optimal control problem, which requires some care in analysis. We will see how we can ensure this problem remains well posed, and demonstrate the gains in performance from using this approach. Tutti gli interessati sono invitati a partecipare. Un saluto cordiale, Emanuela ******************************************************************************************* 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 e-mail: emanuela.rosazza1(a)unimib.it *******************************************************************************************

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Reminder: TOFFEe workshop @IMT, Lucca, 24-25 October
by Irene Crimaldi 23 Sep '19

23 Sep '19

Dear friends and colleagues, this is a reminder for the 1st TOFFEe workshop on* October 24th and 25th*, 2019 in Lucca, Italy. You can find all infos at https://toffee.imtlucca.it/workshops/toffee-workshop-1. We remind you that *the registration to the workshop is free!* Just fill the form at https://toffee.imtlucca.it/workshops/toffee-workshop-1. For organizational reasons, we kindly ask you to register before the* 9th of October*. The registration comprehends two coffee breaks and one lunch. We would be delighted if you could contribute to the workshop with a seminar presenting your latest results. The slot for the contributions last nearly 15 minutes, plus some time for questions. You can send us a *2 pages abstract* at the present email address. The deadline for sending the abstract is on the *25th of September*. We will return our decision on the *2nd of October*. Looking forward to meeting you in Lucca, we send you our best regards, Rocco De Nicola (project coordinator) Guido Caldarelli Irene Crimaldi Marinella Petrocchi Fabio Saracco

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Postdoc positions at LUISS
by Giovanni Alessandro Zanco 22 Sep '19

22 Sep '19

The Department of Economics and Finance at LUISS has some openings for postdocs https://economiaefinanza.luiss.it/en/research/research-grants-0 in particular I recall the following: Scientific Area Mathematics Mathematical models for the time-space evolution of economic variables Proff. Sara Biagini / Fausto Gozzi / Giovanni Alessandro Zanco A notice of competition by way of comparative evaluation is hereby issued for the awarding of 1 research grant at the Department of Economics and Finance of Luiss Guido Carli in the scientific area of Mathematics. Deadline: October 2, 2019 - 2 p.m. - Central European Summer Time (CET), UTC +2 Giovanni A. Zanco Department of Economics and Finance Luiss Guido Carli Viale Romania 32 00197 Roma gzanco(a)luiss.it

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Reminder: A``LATE-SUMMER'' DAY IN PROBABILITY AND STATISTICAL PHYSICS - 27 September 2019 (Picco e Pires da Silva Castro)
by Gianmarco Bet 22 Sep '19

22 Sep '19

Carissimi, Vi ricordiamo che la settimana prossima si terrà la ottava giornata di seminari: A ``LATE-SUMMER'' DAY IN PROBABILITY AND STATISTICAL PHYSICS University of Florence Friday 27 September 2019 Lecturers: Pierre Picco (Marseille) and Rui Pires da Silva Castro (Eindhoven) Location: Aula Tricerri Viale Morgagni 67, Firenze Informazioni su come arrivare alla pagina: https://www.dimai.unifi.it/vp-285-come-arrivare-how-to-get.html <https://www.dimai.unifi.it/vp-285-come-arrivare-how-to-get.html> Note pratiche: Stiamo prenotando un catering con cibi vegerariani e non, percio` abbiamo bisogno del numero di persone che vogliono mangiare insieme. A coloro che fossero interessati (per una migliore organizzazione) chiediamo di mandare un email a francescaromana.nardi(a)unifi.it <mailto:francescaromana.nardi@unifi.it>; gianmarco.bet(a)unifi.it <mailto:gianmarco.bet@unifi.it>; angela.caporicci(a)unifi.it <mailto:angela.caporicci@unifi.it> con l'intenzione di partecipare al seminario, al coffe break e al pranzo. PROGRAMMA Prof. Pierre Picco (CNRS Marseille) Title: One-dimentional Ising model with long range interactions. A review of results Abstract: In the first talk I will make a quick historical survey of the rigorous results on the one-dimensional Ising model with long-range interactions. A first part will be dedicated to uniqueness of the Gibbs states (Ruelle (1968); Dobrushin (1968); Bricmont, Lebowitz & Pfister (1986)) and the regularity of the free energy when the decay of the potential is fast enough (Dobrushin (1973) Cassandro & Olivieri (1981) and its extensions in particular Capocaccia, Campanino & Olivieri (1983). A second part will be dedicated to the existence of phase transition starting from the Kac-Thompson conjecture (1968) the Dyson results (1969), the Frohlich \& Spencer result (1982), the Imbrie result (1982) the Aizenmann, Chayes, Chayes & Newman result on the Thouless effect (1988), Imbrie & Newman result on the Berezinsky, Kosterlitz & Thouless transition (1988). A third part will be dedicated to present results in the phase transition regime that started with Frohlich & Spencer (1981), Cassandro, Ferrari, Merola & Presutti (2001) and its extensions in particular by Cassandro, Merola, Picco & Rosikov (2014) on the definition of an interface and its fluctuations, and on a Minlos & Sinai theorem on the phase separation problem by Cassandro, Merola & Picco (2017). In the second talk I will review heuristic arguments that were invoked to conjecture the existence of a phase transition at low temperature in particular the Landau argument. I will present toy models where the fluctuation of interfaces and localisation of the droplet in the Minlos & Sinai theory will be explained. I will give an algorithmic definition of one-dimensional contours of Cassandro, Ferrari, Merola & Presutti. Prof. Rui Pires da Silva Castro (Eindhoven University of Technology) Title: Testing for the presence of communities in inhomogeneous random graphs Abstract: Many complex systems can be viewed as a network/graph consisting of vertices (e.g., individuals) connected by edges (e.g., a friendship relation). Often one believes there is some sort of community structure, where some vertices are naturally grouped together (e.g., more densely connected between themselves than to the rest of the network). Much of the community detection literature is concentrated around methods that extract communities from a given network. Our goal in this work is different, and we attempt to understand how difficult is it to determine if a network has real communities. Furthermore, we are primarily interested in the case of small or very small communities, for which many existing results and methods are not applicable. We cast this problem as a binary hypothesis test, where the null model corresponds to a graph without community structure, and the alternative model almost the same, but it also includes a planted community - that is, a small subset of the vertices has higher connection probability than under the null. The main question is to determine the minimal size and “strength” of the planted community that will allow detection. The seminal work of Arias-Castro and Verzelen tackled this problem when the null model is a homogeneous random graph. In our work, however, we consider the case where the null model is inhomogeneous, as this is somewhat closer to realistic scenarios. In particular, we present a scan test and provide conditions under which it is able to detect the presence of a small community. These results are valid for a wide variety of parameter choices. Furthermore, we show that for some parameters choices the scan test is optimal, and no other test can perform better (e.g, detect smaller or weaker planted communities). Finally, we extend this scan test to adapt to many parameters of the model when the null is a rank-1 generalized random graph. In the first part of the talk I will describe the above formulation and ensuing results, with illustrative examples and briefly touching upon the analytical methodology. In addition, I will discuss the related problem of characterizing cliques in rank-1 random graphs, which provides some insights on the role of inhomogeneity. The second part of the talk will go deeper into more technical aspects and ensuing insights. This presentation is based on joint work with Kay Bogerd and Remco van der Hofstad (https://arxiv.org/abs/1805.01688 <https://arxiv.org/abs/1805.01688> and ongoing work). Program: 11.00-11.45 Introductory lecture: Picco 11.45-12.00 Break 12.00-12.45 Seminar: Picco 13.00-14.30 Lunch 14.30-15.15 Introductory lecture: Pires da Silva Castro 15.15-15.30 Break 15.30-16.30 Seminar: Pires da Silva Castro Organizers: G. Bet, F. Caravenna, N. Cancrini, E.N.M. Cirillo, P. Dai Pra, A. De Masi, D. Fanelli, F. Flandoli, C. Giardina`, R. Livi, F. Martinelli, I.G. Minelli, F.R. Nardi, E. Presutti, B. Scoppola, E. Scoppola. Ricordo che ciascun oratore fara` una lezione introduttiva e divulgativa di 45 minuti pensata proprio per i non esperti, seguita da altri 45 minuti di tipo seminario (vedi programma). Maggiori informazioni e aggiornamenti sono reperibili alle pagine web http://web.math.unifi.it/users/fnardi/seminari/ <http://web.math.unifi.it/users/fnardi/seminari/> o http://silicio.math.unifi.it/wordpress/probability/days-in-probability-and-… <http://silicio.math.unifi.it/wordpress/probability/days-in-probability-and-…> Vi aspettiamo numerosi Gianmarco Bet e Francesca R. Nardi Dipartimento di Matematica e Informatica Università degli Studi di Firenze Viale Morgagni 67, Firenze, Italy

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[Simai-soci] Fwd: Urgent: Open Letter to reinstate Research and Education as EC areas of focus
by c.costantini＠unich.it 20 Sep '19

20 Sep '19

Inolto questo messaggio della SIMAI. Un saluto, Cristina Costantini Cari Soci, ho ricevuto dalla presidente dell'ICIAM questo messaggio riguardante l'attuale composizione della Commissione Europea, dove non e` piu` presente un Commissario con un mandato specifico alla Ricerca, e alla Formazione, ma solo un generico "Commissioner for innovation and youth". Alcuni colleghi hanno preparato una lettera aperta per la Presidente della Commissione per sollecitare una migliore precisazione delle deleghe in "Education, Research, Innovation and Youth", per ribadire il ruolo fondamentale e specifico della formazione e ricerca. Se condividete la posizione firmate la petizione all'indirizzo indicato nel messaggio allegato (e fate circolare la lettera tra i colleghi). Un saluto, Luca ---------- Forwarded message --------- From: Maria J. ESTEBAN <esteban(a)ceremade.dauphine.fr> Date: Thu, Sep 19, 2019 at 2:05 PM Subject: Fwd: Urgent: Open Letter to reinstate Research and Education as EC areas of focus To: Wil Schilders <w.h.a.schilders(a)tue.nl>, Ari Laptev < laptev(a)mittag-leffler.se>, Helge Holden <secretary(a)mathunion.org>, Volker Mehrmann <Mehrmann(a)math.tu-berlin.de>, Alfio Quarteroni < alfio.quarteroni(a)epfl.ch>, luca formaggia <luca.formaggia(a)polimi.it>, Ball, John M <john.ball(a)hw.ac.uk> Dear friends, urgent action is required in the direction of Bruxelles, not only because there is no longer a commissioner for research (see below), but also because there is the looming threat of a substantial cut of the Horizon Europe Budget. If you resonate with what is written below could you please sign on the web site www.futureofresearch.eu and invite fellow scientists to do the same, i.e. widely distribute the email to all scientists? It is important to have also very visible people who sign, recipient of prizes or directors of big institutes, if you get them to sign, please signal to us so that it can be mentioned on the main webpage. It is urgent as the hearing is on 30.09.2019. At least 10000 signatures are needed in the next few days in order to be able to address the parliament.. thanks so much and all the best Maria ********************* Dear Colleague, We are writing you for the following reason: the candidates for the new EU commissioners were presented last week. In the new commission the areas of education and research are not explicitly represented anymore and instead are subsumed under the "innovation and youth" title. This emphasizes economic exploitability (i.e. "innovation") over its foundation, which is education and research, and it reduces “education” to “youth” while being essential to all ages. We, as members of the scientific community of Europe, wish to address this situation early on and emphasize both to the general public, as well as to relevant politicians on the national and European Union level, that without dedication to education and research there will neither exist a sound basis for innovation in Europe, nor can we fulfill the promise of a high standard of living for the citizens of Europe in a fierce global competition. President von der Leyen, in her mission letter to commissioner Gabriel (Web link to Mandate Letter: https://ec.europa.eu/commission/sites/beta-political/files/mission-letter-ma riya-gabriel-2019_en.pdf <https://ec.europa.eu/commission/sites/beta-political/files/mission-letter-m…>), has emphasized that “education, research and innovation will be key to our competitiveness”. We have prepared an open letter at www.futureofresearch.eu to demand that the EU commission revises the title for commissioner Gabriel to “Education, Research, Innovation and Youth” reflecting Europe’s dedication to all of these crucial areas. We also call upon the European Parliament to request this change in name before confirming the nominees for commissioner. Please support this letter by going to www.futureofresearch.eu and signing up as supporter on line. With best regards, Prof. Dr. Siegfried Bethke (MPI for Physics) Prof. Dr. Nora Brambilla (TU-München) Prof. Dr. Aldo Deandrea (U-Lyon 1) Prof. Dr. Carlo Guaraldo (INFN Frascati) Prof. Dr. Luciano Maiani (U-Roma La Sapienza) Prof. Dr. Antonio Pich (U-València) Prof. Dr. Alexander Rothkopf (U-Stavanger) Prof. Dr. Johanna Stachel (U-Heidelberg) -- ============================================ Multidisciplinary topmaster program in Nanoscience: http://www.rug.nl/research/zernike/education/topmasternanoscience/ ============================================ Prof. Dr. Petra Rudolf Head of the Surfaces and Thin Films group Zernike Institute for Advanced Materials University of Groningen visiting address: Nijenborgh 4, 9747 AG Groningen, The Netherlands postal address: P.O. Box 221, 9700 AE Groningen, The Netherlands phone: +(31)50-363 4736 e-mail: P.Rudolf(a)rug.nl web page: http://www.rug.nl/research/zernike/surfaces-and-thin-films/ secretary: Hilda Riemens phone: +(31)50-363 4973 fax: +(31)50-363 7208 e-mail: H.T.Riemens(a)rug.nl _______________________________________________ Simai-soci mailing list Simai-soci(a)lists.math.unifi.it https://lists.math.unifi.it/mailman/listinfo/simai-soci To unsubscribe, send an email to simai-soci-unsubscribe(a)lists.math.unifi.it and follow the instructions

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ERC funded postdoctoral position at Università di Torino
by Stefano Favaro 18 Sep '19

18 Sep '19

The Department of “Scienze Economico-Sociali e Matematico Statistiche" at Università di Torino, invites applications for a postdoctoral position in Statistics within the European Research Council (ERC) project “Nonparametric Bayes and empirical Bayes for species sampling problems: classical questions, new directions are related issues”. Details of the postdoctoral position are available at the bottom of this letter. Deadline for applications: 8 OCTOBER 2019 at 1pm (Italian time). Information for applicants are available (only in Italian) at the Call for Applications https://pica.cineca.it/unito/assegni-di-ricerca-unito-2019-iv/file/BANDO.pdf <https://pica.cineca.it/unito/assegni-di-ricerca-unito-2019-iv/file/BANDO.pdf>. Within the Call for Applications, the postdoctoral position appears at page 23 under the section “Dipartimento di Scienze Economico-Sociali e Matematico-Statistiche”: Postdoctoral position: “Statistica Bayesiana nonparametrica e Bayesiana nonparametrica empirica per problemi di stima di funzionali discreti” Reference code: ESOMAS.2019.07 Supervisor: Stefano Favaro Applications are made only online - https://pica.cineca.it/unito/ <https://pica.cineca.it/unito/> - by selecting “Your Applications” in the box “Bando Assegni di ricerca - Tornata IV 2019”, and then registering to the system. The application procedure is available in Italian/English, and it requires a CV, two reference letters and a research statement. Prospective candidates may contact directly Stefano Favaro - stefano.favaro(a)unito.it <mailto:stefano.favaro@unito.it> - for information on the postdoctoral position and any assistance in the application procedure. Best wishes Stefano Favaro **** Prospective candidates are expected to have experience on nonparametric statistics, within the classical (frequentist) and/or Bayesian paradigm, and they should preferably be holding a Ph.D. or being close to receiving one. The research shall be carried out in English. The duration of the contract is 24 months. Expected starting date in January 2020, but a different date may be arranged. The salary amounts to 46,000 Euros per year, including taxes and social charges, and considerable financial support to attend conferences and workshops will be granted. There are no teaching duties associated to the position. Abstract. Object of research are species sampling problems, whose importance has grown considerably in recent years driven by numerous applications in the broad area of biosciences, and also in machine learning, theoretical computer science and information theory. Within the broad field of species sampling problems, the research will be focussed on two research themes: i) the study of nonparametric Bayes and nonparametric empirical Bayes methodologies for classical species sampling problems, generalized species sampling problems emerging in biological and physical sciences, and question thereof in the context of optimal design of species inventories; ii) the use of recent mathematical tools from the theory of differential privacy to study the fundamental tradeoff between privacy protection of information, which requires to release partial data, and Bayesian learning in species sampling problems, which requires accurate data to make inference. **** Stefano Favaro University of Torino and Collegio Carlo Alberto http://sites.carloalberto.org/favaro/

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3-year posdoc in Edinburgh
by Tiziano De Angelis 17 Sep '19

17 Sep '19

Dear All, Please find below the advert for a 3-year postdoc at the University of Edinburgh. Best wishes Tiziano %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Announcement: 3-year PostDoc at the University of Edinburgh in Stochastic Analysis for Energy Systems in collaboration with ENSAE ParisTech and FiMe-Lab-Paris A 3-year PostDoctoral position in Edinburgh (Scotland/UK) for a joint collaborative project with Prof P. Tankov (ENSAE ParisTech) and Dr. C. Alasseur (head of Finance of Energy Market Research Centre (EDF-FiMe-Lab)). If you are interested contact us as soon as possible. The overall objective of this 3-year project is to develop novel game-theoretical models and strategies to optimize short term trading and storage in electricity markets, understand the impacts of the large-scale low-cost storage on prices and market structure and help translate the research outcomes to practical industrial solutions. Core scientific requirements: The models that the research team will develop will broadly use existing work optimal control, games, mean-field games, stochastic analysis, mathematical finance. The fellow should have prior knowledge (ideally including having made significant advances) in at least one of the above fields. Core eligibility requirements (all are strict without exception): (a) At the date 31/Oct/2019 the candidate must *not* have resided or carried out their main work activity (including studying) in the UK for more than 12 months in the past 3 years (not counting holidays or short stays). (b) Applicants must, at the date of the application deadline (31 Oct 2019), be in possession of a doctoral degree or have at least four years full-time equivalent research experience. (c) A (5 page) research proposal must be submitted -- If you are interested please contact us as soon as possible (G.dosReis(a)ed.ac.uk) Start date: The start date is negotiable up to the 1/June/2020. Start dates after this timepoint are possible but will reflect a shorter contract duration. Benefits of the position: - salary scale (£33,199 - £39,609/year) - you will receive payments into a pension scheme and other benefits of employment. - Each year, you will be able to use funds up to £2500 to support attendance at conferences and meetings and £6000 to support other research costs. - support available for relocation costs Contact person: Goncalo dos Reis Email: G.dosReis(a)ed.ac.uk Webpage: https://www.maths.ed.ac.uk/~gdosrei %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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Minicourse on Clearing in financial systems by prof Kabanov, LUISS
by Sara 17 Sep '19

17 Sep '19

Professor Yuri Kabanov, University of Besancon, will give three lectures on Clearing in financial systems on the next three Thursdays: September 19, 26 and October 3. The seminars will take place at 17:30 in Room 106a, LUISS viale Romania 32, Roma, and last approximately 2 hours. The program is attached below. Best, Sara Biagini -- Sara Biagini, Professor of Mathematical Finance Department of Economics and Finance LUISS Guido Carli Address: viale Romania, 32 - 00197 Roma Web: http://sites.google.com/site/sarabiagini/

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Posto RTDB mat/06 alla Sapienza
by Faggionato, Alessandra 16 Sep '19

16 Sep '19

Buongiorno, segnalo che e` uscito il bando per un posto da Ricercatore di Tipo B Mat/06 presso il Dipartimento di Matematica all'Universita' La Sapienza: https://web.uniroma1.it/trasparenza/dettaglio_bando/145453 Vi pregherei di diffondere la notizia tra i possibili interessati. Grazie Saluti, Alessandra -- ************************************************* 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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