Random May 2022

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42 participants
53 discussions

Concorso da RTDb di MAT/06 a Padova - scadenza 25/8/2016
by Marco Ferrante 25 Jun '24

25 Jun '24

Cari colleghi, vi segnalo che il Dipartimento di Matematica dell'Università di Padova ha bandito un posto di ricercatore di tipo B nel settore MAT/06. Il bando è disponibile alla pagina http://www.math.unipd.it/it/news/?id=1898 La scadenza per la presentazione delle domande è il 25 agosto 2016. Marco Ferrante

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Seminar: Riccardo Maffucci at Tor Vergata
by mic sal 09 Nov '22

09 Nov '22

Dear all, next Thursday, May 5th, Riccardo Maffucci (EPFL) will give a seminar about "Distribution of nodal intersections for random waves". Abstract: This work is in collaboration with Maurizia Rossi. Random waves are Gaussian Laplacian eigenfunctions on the 3D torus. We investigate the length of intersection between the zero (nodal) set, and a fixed surface. Expectation, and variance in a general scenario are prior work. In the generic setting we prove a CLT. We will discuss (smaller order) variance and (non-Gaussian) limiting distribution in the case of ’static’ surfaces (e.g. sphere). Under a certain assumption, there is asymptotic full correlation between intersection length and nodal area. The seminar will take place in Aula De Blasi, Università Tor Vergata, at 16h00. We encourage in-person partecipation, but should you unable to come here is the link to the event on Teams: https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw… The seminar is part of the Excellence Project Math@TOV. You can find a schedule with the next events at the following link: https://www.mat.uniroma2.it/~rds/events.php .

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Workshop Interacting particle systems and applications, Trento Sep 5-7
by Mario Maurelli 02 Sep '22

02 Sep '22

Dear colleagues, We are happy to announce the workshop "*Interacting particle systems and applications*" which will take place at the *University of Trento* on* September 5th to 7th, 2022*. The workshop aims at discussing recent developments in the theory of interacting systems, with emphasis on fostering collaborations and discussions among junior researchers. At the following webpage (which will be kept up-to-date) https://sites.google.com/view/ipsa2022 you can find useful information on the workshop, including list of speakers, venue and (when available) schedule and abstracts of the talks. Participation is free but *registration is mandatory. We kindly ask you to register no later than June 30th*. The workshop is planned as a hybrid event (in-person and online); to register for in person participation, click on "register" button (in the home webpage of the workshop); to register for online participation, send an email to ipsa[dot]maths[at]unitn[dot]it . We are looking forward to meeting you in Trento. All the best, The organizing committee Michele Coghi, Mario Maurelli, Carlo Orrieri, Giovanni Zanco

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Workshop in Milan
by Giuseppina Guatteri 29 Aug '22

29 Aug '22

Con piacere annunciamo il "Two-day workshop on deterministic and stochastic control" che si terrà presso il campus Leonardo nelle giornate 6/7 settembre 2022. Alla seguente pagina web potete trovare le informazioni che via via verranno aggiornate, oltre che il form di Registrazione (scadenza 20 agosto). Sito web: https://sites.google.com/view/controlpolimi22 Un caro saluto, Giulia Cavagnari, Fulvia Confortola, Giuseppina Guatteri ed Elsa Maria Marchini It is our pleasure to announce the "Two-day workshop on deterministic and stochastic control" that will be held at campus Leonardo on 6/7 September 2022. At the following web-page you can find all the information which will be kept updated, along with the Registration form (deadline 20 August). Web-site: https://sites.google.com/view/controlpolimi22 Best regards, Giulia Cavagnari, Fulvia Confortola, Giuseppina Guatteri ed Elsa Maria Marchini Giuseppina Guatteri Dipartimento di Matematica Politecnico di Milano Via Bonardi, 9 20133 Milano tel.: +390223994556 fax.:+390223994513 email: giuseppina.guatteri(a)polimi.it "Happiness can be found even in the darkest of times, if one only remembers to turn on the light" A. Dumbledore

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Seminario S Castruccio - Politecnico di Milano
by Laura Maria Sangalli 31 May '22

31 May '22

Si avvisa che in data 07-06-2022, alle ore 15:30 precise presso il Politecnico di Milano, Dipartimento di Matematica, Aula Saleri sesto piano (Edificio 14 - La Nave), nell’ambito delle attività del MOX, si svolgerà il seguente seminario: Stefano Castruccio, University of Notre Dame Titolo: Physics-Informed, Data-Driven and Hybrid Approaches to Space-Time Systems Abstract: In this talk I will discuss two different approaches to characterize space-time systems. This first one is model-driven and loosely inspired by physics, assumes that the system is locally diffusive through a stochastic partial differential equation, and can be efficiently approximated with a Gaussian Markov random field. This approximation will be used to produce a stochastic generator of simulated multi-decadal global temperature, thereby offering a fast alternative to the generation of large climate model ensembles. The second approach is instead data-driven, and relies on (deep) neural networks in time. Instead of traditional machine learning methods aimed at inferring an extremely large parameter space, we instead rely on an alternative fast, sparse and computationally efficient echo state network dynamics on an appropriately dimensionally reduced spatial field. The additional computational time is then used to produce an ensemble and probabilistically calibrate the forecast. The approach will be used to produce air pollution forecasts from a citizen science network in San Francisco and forecasting wind energy in Saudi Arabia. Towards the end of the presentation, I will discuss how these two broad frameworks could be used in synergy to allow for improved predictability and understanding of space-time systems whose physical understanding is currently limited and/or largely influenced by parametrizations. Link: https://mox.polimi.it/mox-seminars/?id_evento=2169 Il link per seguire il seminario online sarà reso disponibile su Link zoom: https://polimi-it.zoom.us/j/91015435557 L’evento è patrocinato da GRASPA https://graspa.org Tutti gli interessati sono cordialmente invitati a partecipare, Laura Sangalli —— Laura Maria Sangalli MOX - Dipartimento di Matematica Politecnico di Milano Piazza Leonardo da Vinci 32 20133 Milano - Italy tel: +39 02 2399 4554 fax: +39 02 2399 4568 email: laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it> url: http://mox.polimi.it/~sangalli

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Posizione RTDA in MAT06 Sapienza Roma
by Alessandro Degregorio 31 May '22

31 May '22

Cari tutti, in data odierna è stato pubblicato il Bando n. RTDA/03/2022 PROT. N. 805/2022 della procedura selettiva, per titoli e colloquio, per il reclutamento di* n. 1 ricercatore con rapporto di lavoro a tempo determinato di tipologia “A”*, per l’esecuzione del programma di ricerca relativo al seguente progetto: “Teoria dei processi aleatori” - Settore concorsuale 01/A3, *Settore scientifico-disciplinare **MAT/06*, presso il Dipartimento di Scienze Statistiche, Università di Roma "La Sapienza". Il bando è visionabile sul sito della trasparenza Sapienza al seguente link: https://web.uniroma1.it/trasparenza/bando/191351_rtda/03/2022 Si prega di dare la massima diffusione del presente avviso presso tutti gli interessati. Cordiali saluti, Alessandro De Gregorio

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avviso di seminari
by Barbara Martinucci 30 May '22

30 May '22

UNIVERSITA' DI SALERNO Dipartimento di Matematica AVVISO DI SEMINARI Mercoledì 1 giugno 2022, nella sala del consiglio del Dipartimento di Matematica, edificio F2, livello 1, si terranno i seguenti seminari in presenza e online (su Teams): 1) ore 15:00-15:45 - Prof. Enrico Scalas (University of Sussex, Brighton, UK) Limit theorems for prices of options written on semi-Markov processes link: https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZmRiNmFjZmUtNmFlMS00… We consider plain vanilla European options written on an underlying asset that follows a continuous time semi-Markov multiplicative process. We derive a formula and a renewal type equation for the martingale option price. In the case in which intertrade times follow the Mittag-Leffler distribution, under appropriate scaling, we prove that these option prices converge to the price of an option written on geometric Brownian motion time-changed with the inverse stable subordinator. For geometric Brownian motion time changed with an inverse subordinator, in the more general case when the subordinator's Laplace exponent is a special Bernstein function, we derive a time-fractional generalization of the equation of Black and Scholes. This is joint work with Bruno Toaldo 2) ore 16:00-16:45 - Dott. Giacomo Ascione (Scuola Superiore Meridionale, Napoli) Bulk behaviour of ground states for relativistic Schrödinger operators with spherical potential well link: https://teams.microsoft.com/l/meetup-join/19%3ameeting_OTMzYTBmYTAtZDFiYS00… In this talk, we show a probabilistic representation of the ground state of a massive or massless Schrödinger operator with a spherical potential well. Such a representation will lead to a two-sided approximation with different behaviours depending on the fact that we are inside or outside the well. Both of them rely on some functionals of the first exit time of a subordinated Brownian motion from a suitable open set (the well or its complement). We also develop a moving planes-type argument to prove the radial monotonicity of the ground state, which is one of the main tools of the two-sided bounds. This is joint work with József Lőrinczi. Gli interessati sono cordialmente invitati a partecipare, Cordiali saluti, Barbara Martinucci

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5 Luglio (online): La Statistica al CNR al servizio del Paese
by Fabrizio Ruggeri 30 May '22

30 May '22

Vi segnalo che la sede milanese dell'IMATI CNR ha organizzato un evento online il 5 luglio in cui 12 ricercatori CNR, di diversi istituti e diversa formazione, presenteranno loro lavori. L'iniziativa, in collaborazione con la Societa' Italiana di Statistica e nell'ambito delle iniziative verso il Festival della Statistica e della Demografia (Treviso, 16-18 Settembre), intende mostrare alla comunita' statistica nazionale cio' che si fa al CNR (e non e' praticamente conosciuto da questa) e anche favorire interazioni fra ricercatori CNR che spesso operano senza sapere che ci sono altri colleghi che utilizzano e sviluppano metodi e modelli stocastici. Il sito web e' https://sis.mi.imati.cnr.it/index.html E' possibile registrarsi entro il 26 giugno. Nei giorni successivi verranno inviate ai registrati le indicazioni sulla piattaforma online che verra' utilizzata. Cordiali saluti Fabrizio Ruggeri -- Fabrizio Ruggeri fabrizio AT mi.imati.cnr.it CNR IMATI tel +39 0223699532 Via Alfonso Corti 12 fax +39 0223699538 I-20133 Milano (Italy) www.mi.imati.cnr.it/fabrizio

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teaching assistants
by Marco Scarsini 29 May '22

29 May '22

We are looking for teaching assistants for various mathematical courses in the fall semester. Some of these courses are taught in English and some in Italian. In particular, we need TAs for a master course in Probability (taught in English). ******************************************************* Marco Scarsini Dipartimento di Economia e Finanza Luiss University Viale Romania 32 00197 Roma, ITALY URL: http://docenti.luiss.it/scarsini/

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Probability Seminar in Sapienza
by Lorenzo Taggi 26 May '22

26 May '22

Dear All, next Tuesday Nicolas Forien (Sapienza Università di Roma) will give a seminar talk on particle systems and interacting random walks. Please find the title and the abstract below. Best regards, Lorenzo Taggi Tuesday 31st of May, 16.15, Dipartimento di Matematica Università Sapienza, Aula Consiglio *Title:* On the phase transition of activated random walks *Abstract:* The Activated Random Walk model consists of particles which perform independent random walks on a graph and fall asleep with a certain rate. Sleeping particles stop moving and are awaken when another particle arrives on the same site. The model on Z^d presents a phase transition: depending on the density of particles (initially all active) and on the sleep rate, either almost surely each particle eventually falls asleep forever (fixating phase), or almost surely no particle falls asleep forever (active phase). In this talk, I will present a joint work with Alexandre Gaudillière (arxiv.org/abs/2203.02476) showing the existence of an active phase on Z^2: for every positive initial density of particles, for a sufficiently low sleep rate, almost surely no particle falls asleep forever.

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