- Random - Mailing list — Dipartimento di Matematica, UniPI

Assegno di ricerca (Research fellowship) Dipartimento di Scienze Chimiche, Università di Padova
by Marco Ferrante 09 Jul '23

09 Jul '23

Assegno di ricerca presso il Dipartimento di Scienze Chimiche (Gruppo di Chimica Teorica), Università di Padova Research fellowship at the Department of Chemical Sciences (Theoretical Chemistry Group), University of Padova ·*Progetto PNRR / PNRR Project*: CN HPC Spoke 1 ·*Durata dell’assegno / Duration of the fellowship*: 12 mesi / months ·*Selezioni / Selections*: 22.08.2023 ·*Inizio dell’assegno / Felloship starts in*: settembre o ottobre 2023 / september or october 2023 ·*Lordo percipiente / gorss amount*: 19367.00 Euro ·*Titolo/Title* Strategie meshless ottimizzate tramite machine learning per la soluzione di equazioni stocastiche in molti gradi di libertà Machine learning-optimized meshless strategies for the solution of stochastic equations in many degrees of freedom ·*Progetto/Project* L’assegnista si occuperà dello sviluppo e dell’implementazione di un software per risolvere equazioni stocastiche in molti gradi di libertà, in particolare ottimizzandolo su GPU o architetture hardware simili, ossia che permettano una parallelizzazione estesa su singola scheda. La strategia di risoluzione si baserà su tecniche meshless, dato che il software dovrà essere in grado di affrontare problemi con O(10-100) gradi di libertà. Per ridurre il costo computazionale sarà necessario stabilire la miglior scelta (adattiva) dei punti su cui rappresentare la soluzione dell’equazione. A tale scopo, tecniche di machine learning potranno sfruttare la costruzione iterativa della soluzione sia per accelerare il processo stesso, sia per definire la miglior distribuzione di punti. The research fellow will be responsible for the development and implementation of a software package able to solve stochastic equations in many degrees of freedom. The software should be optimized for GPUs or similar hardware architectures that allow for extensive parallelization on a single board. The resolution strategy will be based on meshless techniques since the software needs to be able to handle problems with O(10-100) degrees of freedom. To reduce the computational cost the optimal (adaptive) choice of points for representing the solution of the equation must be determined. To this purpose, machine learning techniques can be used to exploit the iterative construction of the solution, both to speed up the process itself and to define the best distribution of points. ·*Link (dal / from 13.07.2023 al / to 28.07.2023)*: https://www.dei.unipd.it/node/43362 <https://www.dei.unipd.it/node/43362> -- Prof. Marco Ferrante Prorettore alla Didattica Vice-Rector for Teaching and Education Dipartimento di Matematica "Tullio Levi-Civita" Università degli Studi di Padova Via Trieste 63 , I-35121 Padova - ITALY Tel: +39-0498271366 Fax: +39-0498271499 E-Mail:ferrante@math.unipd.it URL:http://www.math.unipd.it/~ferrante

1 0

Seminario Prof. Claudio Macci
by epirozzi 07 Jul '23

07 Jul '23

AVVISO di SEMINARIO Prof. CLAUDIO MACCI Dipartimento di Matematica, UNIVERSITÀ Tor Vergata, ROMA TITLE Non-central moderate deviations for compound fractional Poisson processes Abstract The term moderate deviations is often used in the literature to mean a class of large deviation principles that, in some sense, fills the gap between a convergence in probability to zero (governed by a large deviation principle) and a weak convergence to a centered Normal distribution. We talk about non-central moderate deviations when the weak convergence is towards a non-Gaussian distribution. In this paper we study non-central moderate deviations for compound fractional Poisson processes with light-tailed jumps. Joint work with Luisa Beghin. Il seminario si terrà il giorno 12 LUGLIO 2023 ore 16:00 nella Aula E del Dipartimento Matematica e Applicazioni, Università di Napoli FEDERICO II, Complesso di Monte Sant'Angelo, Via Cintia, Napoli. Link to Teams: https://teams.microsoft.com/l/meetup-join/19%3aMQ4RZDBo_0G-K_PHxKtktVYAczOG… -- Enrica Pirozzi Professore Associato di Probabilità e Statistica, Dipartimento di Matematica e Applicazioni, Università di Napoli FEDERICO II Via Cintia, 80126, NAPOLI https://www.docenti.unina.it/enrica.pirozzi

1 0

Seminario Prof. Enrico Scalas
by epirozzi 07 Jul '23

07 Jul '23

AVVISO di SEMINARIO Prof. ENRICO SCALAS School of Mathematical and Physical Sciences of SUSSEX UNIVERSITY TITLE A fractional Hawkes process Abstract A Hawkes point process with kernel proportional to the probability density function of Mittag- Leffler random variables is introduced. This kernel decays as a power law with exponent $\beta+1 \in (1,2]$. Several analytical results are proved, in particular for the expected intensity of the point process and for the expected number of events of the counting process. These analytical results are used to validate algorithms that numerically invert the Laplace transform of the expected intensity as well as Monte Carlo simulations of the process. Finally, Monte Carlo simulations are used to derive the distribution of the number of events. The algorithms used for this presentation are available at https://github.com/habyarimanacassien/Fractional-Hawkes Relevant papers: Chen, J, Hawkes, A G and Scalas, E (2021) A fractional Hawkes process. In: Beghin, Luisa, Mainardi, Francesco and Garrappa, Roberto (eds.) Nonlocal and fractional operators. SEMA SIMAI Springer Series, 26 . Springer International Publishing, pp. 121-131. Habyarimana, Cassien, Aduda, Jane A, Scalas, Enrico, Chen, Jing, Hawkes, Alan G and Polito, Federico (2023) A fractional Hawkes process II: further characterization of the process. Physica A: Statistical Mechanics and its Applications, 615. pp. 1-11. Il seminario si terrà il giorno 12 LUGLIO 2023 ore 15:00 nella Aula E del Dipartimento Matematica e Applicazioni, Università di Napoli FEDERICO II, Complesso di Monte Sant'Angelo, Via Cintia, Napoli. Link to Teams: https://teams.microsoft.com/l/meetup-join/19%3aMQ4RZDBo_0GK_ PHxKtktVYAczOGbTqLmWu95Avgs0s1%40thread.tacv2/1688622949094?context=%7b%22T id%22%3a%222fcfe26a-bb62-46b0-b1e3-28f9da0c45fd%22%2c%22Oid%22%3a%229413faf6- db8e-4858-98b1-442e3ee2a5df%22%7d -- Enrica Pirozzi Professore Associato di Probabilità e Statistica, Dipartimento di Matematica e Applicazioni, Università di Napoli FEDERICO II Via Cintia, 80126, NAPOLI https://www.docenti.unina.it/enrica.pirozzi

1 0

Seminar Barbara Vantaggi in Bologna
by Sabrina Mulinacci 06 Jul '23

06 Jul '23

Dear alla we are glad to announce the seminar of Barbara Vantaggi at the Department of Statistical Sciences of the University of Bologna The seminar is today July 6th 2023 at 4 pm. A dynamic Choquet pricing rule with bid-ask spreads under ambiguity We introduce a dynamic pricing rule allowing for frictions in the form of bid-ask spreads, by modeling “risk-neutral” uncertainty through belief functions. The aim is to face pricing in a multi-period binomial market model under ambiguity. To this purpose, we introduce and characterize Dempster-Shafer multiplicative binomial processes together with the induced conditional Choquet expectation operator. Next, we consider a market formed by a frictionless risk-free bond (whose price is modeled by a deterministic process) and a non-dividend paying stock with frictions (whose lower price is modeled by a Dempster Shafer multiplicative binomial process). In this market we prove an analog of the classical theorem of change of measure relying on the notion of equivalent one-step Choquet martingale belief function. We then propose a dynamic Choquet pricing rule with bid-ask spreads showing that the discounted lower price process of a European derivative contract on the stock is a Choquet super-martingale. We also provide a normative justification in terms of a dynamic generalized no-arbitrage condition. We finally discuss the connections of the introduced dynamic pricing rule with time-consistency and dynamic risk measures. The talk is based on papers in collaboration with A.Cinfrignini and D. Petturiti Here is the link to attend online: Partecipa da computer, app per dispositivi mobili o dispositivo della stanza Fai clic qui per partecipare alla riunione<https://teams.microsoft.com/l/meetup-join/19%3ameeting_NzRkYzA3N2QtYzYyNi00…> ID riunione: 351 139 477 023 Passcode: RzjM3Z

1 0

RoMaDS: A day on Statistical Physics for Machine Learning
by Stefano Vigogna 06 Jul '23

06 Jul '23

Dear all, we are glad to announce the workshop RoMaDS: A day on Statistical Physics for Machine Learning http://www.mat.uniroma2.it/~rds/statphyml.php which will take place at University of Rome Tor Vergata on September 15, 2023. Invited speakers: Andrea Agazzi Elena Agliari Giulio Biroli Matthieu Wyart Riccardo Zecchina Registration at https://docs.google.com/forms/d/e/1FAIpQLSeXVfuC4speVe0_xjGB0h-l3p6iU57lX2_… Is free but compulsory. Thanks for sharing with those who might be interested. The organizers Domenico Marinucci, Michele Salvi, Stefano Vigogna

1 0

Reminder - Amases Summer School
by Roy Cerqueti 05 Jul '23

05 Jul '23

Dear all, this is to inform you that the first edition of the AMASES Summer School will be held next September 4-6 at the University of Rome "La Sapienza", Building CU002. The goal of the Amases summer schools is to train young scholars on topics that are relevant in the context of mathematics applied to the social sciences. This year the title of the school is Social, Financial and Economic Networks. More information on the website: https://www.amases.org/amases-summer-school-2023/ For any question, do not hesitate to contact the organizers: Fabrizio Lillo <fabrizio.lillo(a)unibo.it> Roy Cerqueti <roy.cerqueti(a)uniroma1.it> -- **Fai crescere le giovani ricercatrici e i giovani ricercatori* **con il 5 per mille alla Sapienza *Scrivi il codice fiscale dell'Università *80209930587 Cinque per mille <https://www.uniroma1.it/it/node/23149>*

1 0

Call for expressions of interest in a research fellow position at the University of Milano-Bicocca
by marina pireddu 04 Jul '23

04 Jul '23

We would like to advertise a research fellowship, related to PRIN 2022 "Evolutionary Poisson Games: Theory and Applications", that will soon be available at the University of Milano-Bicocca, of the duration of 18 months, starting from the beginning of 2024. The net monthly salary will be about 1490 euros. The main goal of the research activity is the investigation of socio-economic phenomena by means of an evolutionary game theoretic approach, which leads to nonlinear dynamic models, to be studied via analytical and computational methods, in particular in relation to their stability, bifurcations and chaotic behavior. The research unit is composed by Fausto Cavalli, Ahmad Naimzada, Daniela Visetti and myself. Expressions of interest can be sent to marina.pireddu(a)unimib.it Best regards, Marina Pireddu

1 0

I: Re: [EXTERN] Re: PhD and Postoc Positions - University of Basel and IBM Research Zürich
by Marco Alessandro Fuhrman 03 Jul '23

03 Jul '23

Buongiorno. Inoltro volentieri il messaggio seguente, nella speranza che possa trovare persone interessate. Cordiali saluti. Marco Fuhrman ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Cari, Sono Enea Monzio Compagnoni(https://www.linkedin.com/in/eneamc/ ) e faccio parte del gruppo di ricerca del Prof. Dr. Aurelien Lucchi(https://dmi.unibas.ch/de/personen/aurelien-lucchi/ ) presso l'Università di Basilea. Il nostro gruppo sta cercando due candidati al dottorato e un post-doc per una collaborazione con IBM Research di Zurigo. Serve che i candidati abbiano un forte background teorico in matematica e/o fisica, ottimizzazione e Quantum Computing. Ecco le posizioni: https://jobs.unibas.ch/offene-stellen/phd-position-in-the-field-of-theoreti… https://jobs.unibas.ch/offene-stellen/phd-position-in-the-field-of-optimiza… https://jobs.unibas.ch/offene-stellen/postdoc-position-in-the-field-of-quan… Più in generale, sentitevi liberi di contattarci se avete studenti interessati a Machine Learning che hanno anche un forte background in Probabilità, Calcolo Stocastico, Analisi (funzionale, reale, convessa, PDE), Ottimizzazione, e altri argomenti rilevanti. In tal caso, contattate direttamente Prof. Lucchi all'indirizzo aurelien.lucchi(a)unibas.ch Vi ringrazio dell'attenzione. Cordiali saluti, Enea Monzio Compagnoni

1 0

SPASS Seminar: Jonathan Mattingly
by Andrea Agazzi 03 Jul '23

03 Jul '23

Dear Colleagues, We would like to invite you to the following SPASS <https://sites.google.com/unipi.it/spass> seminar, jointly organized by UniPi, SNS, UniFi and UniSi: *Ergodicity, Positive Lyapunov Exponents, and Partial Damping for Random Switching* by *Jonathan Mattingly* (Duke University) The seminar will take place *tomorrow TUE, 04.07.2023* at *14:00 CET* in Aula Seminari, Department of Mathematics, University of Pisa and streamed online here <https://meet.google.com/gji-phwo-vbg>. The organizers, A. Agazzi, G. Bet, A. Caraceni, F. Grotto, G. Zanco https://sites.google.com/unipi.it/spass --------------------------------------- *Abstract: I will consider some new models inspired by the PDEs/SPDE with complex dynamics such as the 2D Euler and Navier-Stokes equations. The models introduce randomness onto the system through a random splitting scheme. I will explain how the randomly split Galerkin approximations of the 2D Euler equations and other related dynamics can be shown to possess a unique invariant measure that is absolutely continuous with respect to the natural Liouville measure, despite the existence of other invariant measures corresponding to fix points of the PDEs. I will then explain how on proves that the dynamics with respect to this measure has positive Lyapunov exponents almost surely.Lastly, I will discuss recent results which show that the system has a unique invariant measure even when damping is applied to part of the system.This is joint work with Omar Melikechi, Andrea Agazzi, and David Herzog.*

1 0

Call for expressions of interest in a research fellow position at the University of Milano-Bicocca
by marina pireddu 03 Jul '23

03 Jul '23

Dear All, we would like to advertise a research fellowship, related to PRIN 2022 "Evolutionary Poisson Games: Theory and Applications", that will soon be available at the University of Milano-Bicocca, of the duration of 18 months, starting from the beginning of 2024. The net monthly salary will be about 1490 euros. The main goal of the research activity is the investigation of socio-economic phenomena by means of an evolutionary game theoretic approach, which leads to nonlinear dynamic models, to be studied via analytical, simulative and computational methods, in particular in relation to their stability, bifurcations and chaotic behavior. The research unit is composed by Fausto Cavalli, Ahmad Naimzada, Daniela Visetti and myself. Expressions of interest can be sent to marina.pireddu(a)unimib.it Best regards, Marina Pireddu

1 0