- Random - Mailing list — Dipartimento di Matematica, UniPI

AVVISO DI SEMINARIO
by Barbara Martinucci 12 Jul '23

12 Jul '23

Università di Salerno Dipartimento di Matematica AVVISO DI SEMINARIO La *dott.ssa Diana Taipe Hidalgo* (Faculty of Statistical Studies, Complutense University of Madrid) terrà, *giovedì 13 luglio, alle ore 13:00*, presso la Sala Riunioni dell'Edificio F2 (piano 1, stanza 36), un seminario dal titolo: *"*A Markovian epidemic model with a limited number of hospital beds*"* L'abstract è in allegato. Link su Teams: https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZDFiNWFiMjctYjc1NC00… Cordiali saluti, Antonio Di Crescenzo Barbara Martinucci

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Postdoc position in Luxembourg (G. Peccati)
by Giovanni Peccati 11 Jul '23

11 Jul '23

Dear Colleagues, I am happy to announce that there is an opening for a* 2 years post-doc position* in my research group - at the *Department of Mathematics of Luxembourg University* <https://wwwfr.uni.lu/recherche/fstm/dmath> - starting on *December 1st, 2023 *(or later). At a later stage, it will be possible to extend the position by one additional year. Here is a link to the page of the official announcement, from which it is possible to apply http://emea3.mrted.ly/3gqx0 With my best regards, Giovanni Peccati -- Prof. Giovanni Peccati ------------------------------------------ Head of the Department of Mathematics Faculty of Science, Technology and Medicine ------------------------------------------ University of Luxembourg ----------------------------------------- homepage: http://sites.google.com/site/giovannipeccati/home E-mail: giovanni.peccati(a)gmail.com

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RTD-A SECS-S/06 at the Scuola Normale Superiore, Pisa
by Fabrizio Lillo 10 Jul '23

10 Jul '23

Dear all, the Scuola Normale Superiore (Pisa, Italy) has opened the call for the recruitment of an RTD-A (three year fixed term researcher) in the scientific sector SECS-S/06 Mathematical Methods of Economics, Finance and actuarial Sciences. The call is available at https://amministrazionetrasparente.sns.it/bando/selezione-di-1-ricercatore-… and the deadline is July 28. The position is partially funded by the grant PNRR - Infrastrutture di Ricerca - SoBigData.it Please distribute the call to potentially interested applicants Fabrizio Lillo ---------------------------------------- Fabrizio Lillo Dipartimento di Matematica, Università di Bologna Scuola Normale Superiore, Pisa ITALY Personal website: fabriziolillo.wordpress.com University website: www.unibo.it/sitoweb/fabrizio.lillo <http://fabriziolillo.wordpress.com/> phone: +39 050509159

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Fwd: 25 scholarships in Demography and Social Statistics - PhD Life Course Research
by Alessandra Fabbri Colabich 10 Jul '23

10 Jul '23

We forward for your information -------- Messaggio Inoltrato -------- Oggetto: 25 scholarships in Demography and Social Statistics - PhD Life Course Research Data: Fri, 7 Jul 2023 09:35:29 +0200 Mittente: Daniele Vignoli <daniele.vignoli(a)unifi.it> <daniele.vignoli(a)unifi.it> Dear Colleagues and friends, I would like to inform you about the launch of a new *PhD Program* in *Life Course Research* <https://www.phd-lcr.com>, based on a national alliance among 29 associated Universities across Italian regions. The program offers *25 PhD scholarships* in *Demography *and *Social Statistics *(a list of topics, with the corresponding reference persons, can be found here <https://www.phd-lcr.com/socio-demographic-research-topics>). The PhD program in *Life Course Research* fosters the study of life courses and the significant events that shape them from a *holistic and transdisciplinary perspective*. The program establishes a Scientific Consortium between scholars from the *biomedical, psychological, and socio-demographic fields*. The PhD program in *Life Course Research* will train a new generation of highly skilled scholars with a strong emphasis on *quantitative methods *and *data analysis*. *Unique features* of the Phd in *Life Course Research* are: 1) *Thematic* rather than disciplinary identity; 2) *Super-departmental* and *super-regional* nature of the Consortium to overcome the fragmentation of local approaches; 3) *Multilevel teaching structure* (national/local). The deadline for applications is *August 7*. More info here: https://www.phd-lcr.com How to apply: https://www.unifi.it/p12401.html Best wishes, Daniele Vignoli *---* *Daniele Vignoli* Professor of Demography www.danielevignoli.com *DiSIA* - Dipartimento di Statistica, Informatica, Applicazioni University of Florence Viale G.B. Morgagni 59

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Ricercatore Tenure Track, SECS-S/01 U. Insubria scadenza 27/07/23
by Mira Antonietta 10 Jul '23

10 Jul '23

Cari colleghi, nella Gazzetta Ufficiale n. 48 del 27/06/2023 e nel sito del MUR è stato pubblicato l’avviso del bando per l’assunzione di n. 1 ricercatore a tempo determinato in tenure track (RTT) ai sensi dell’art. 24 della legge 30 dicembre 2010 n. 240, presso il Dipartimento di Economia – nell’ambito del progetto “Dipartimenti di Eccellenza 2023 - 2027” Il bando integrale e la modulistica per la partecipazione sono disponibili nel sito web alla pagina concorsi (“Ricercatori”) https://www.uninsubria.it/concorsi Ricercare la procedura di interesse mediante il codice concorso: BR159 ovvero al link sotto https://www.uninsubria.it/opportunita/n-1-ricercatore-tempo-determinato-ten… La domanda di partecipazione dovrà essere presentata entro e non oltre il giorno 27/07/2023, esclusivamente per via telematica, utilizzando l’applicazione informatica alla pagina: https://pica.cineca.it/uninsubria/ Per eventuali informazioni contattare l’Ufficio Reclutamento docenti (tel. 0332/21 9182–9183-9184 e-mail: reclutamento.docenti(a)uninsubria.it) Vi prego di dare la più ampia visibilità al bando a giovani meritevoli interessati a partecipare. Grazie e cordiali saluti, Antonietta

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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

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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

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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

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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

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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

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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>*

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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

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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

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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.*

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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

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RTDA STATISTICA POLIMI
by Laura Maria Sangalli 01 Jul '23

01 Jul '23

E' appena stata bandita una posizione RTD-A presso il Dipartimento di Matematica del Politecnico di Milano nel settore SECS-S/01 sul tema: "Sviluppo e implementazione di modelli e algoritmi per analisi di dati complessi". Selezione pubblica per l'assunzione di 1 Ricercatore a tempo determinato (Junior) ai sensi dell'art. 24, comma 3, lettera a) Legge 30.12.2010, n. 240, Tempo pieno - Settore Concorsuale 13/D1 - STATISTICA, bandita con Decreto Direttoriale n. 6288 del 31/05/2023, pubblicato sulla G.U. del 20/06/2023, n. 46 (Codice procedura: 2023_RTDA_DMAT_4). Scadenza: 20-07-23 Dettagli della procedura: https://www.polimi.it/personale-docente/lavorare-al-politecnico/bandi-e-con… Programma di Ricerca: ll mondo della data science è attualmente impegnato nello sviluppo di strumenti per l'analisi di dati complessi (ad es. dati ad alta dimensione, gerarchici, non euclidei o con dipendenza spaziale e/o temporale) provenienti da diversi campi di applicazione. In questo contesto, si sono resi necessari modelli e algoritmi flessibili per fare esplorazione, inferenza e predizione in modo affidabile.La ricerca si concentrerà sullo sviluppo, l'implementazione e la validazione di modelli e algoritmi nell'ambito dello Statistical Learning con l'obiettivo di migliorare l'efficienza statistica e computazionale rispetto all'attuale stato dell’arte. La proposta è coerente con il tema del PNRR Ricerca e TT, High Performance Computing, Quantum Computing e riguarda tematiche di ricerca relative alla linea 'matematica per lo sviluppo sostenibile' del progetto del Dipartimento di Eccellenza del DMAT (www.mate.polimi.it/eccellenza/<http://www.mate.polimi.it/eccellenza/>). Per informazioni: Prof. Simone Vantini – simone.vantini(a)polimi.it<mailto:francesca.ieva@polimi.it> —— Laura Maria Sangalli MOX - Dipartimento di Matematica Politecnico di Milano Piazza Leonardo da Vinci 32 20133 Milano - Italy (+39) 02 2399 4554 laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it> https://sangalli.faculty.polimi.it

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Estensione deadline special issue DEAF
by salvatore federico 30 Jun '23

30 Jun '23

Buongiorno, comunico che la deadline per la special issue DEAF "Advances in Optimal Control and Dynamic Games in Economics, Finance and Insurance" https://www.springer.com/journal/10203/updates/23587054 <https://www.springer.com/journal/10203/updates/23587054> di cui era stato dato annuncio in precedenza alla lista, è stata estesa al 30 settembre 2023 Salvatore Federico

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Seminario di Giovanni Conforti a Roma Tre il 7 luglio 2023
by Pietro Caputo 30 Jun '23

30 Jun '23

Venerdì 7 luglio 2023 alle ore 14:30, Aula M3 Dipartimento di Matematica e Fisica di Roma Tre, Largo San Leonardo Murialdo,1- 00146 Roma. Speaker: Giovanni Conforti (CMAP Ecole Polytechnique, Paris) Title: Stable convexity profiles for Hamilton Jacobi Bellman equations and applications to entropic optimal transport. Abstract: It is well known that solutions of the Hamilton-Jacobi-Bellman (HJB) equation with a convex terminal condition remain convex at all times. In this sense, the set of convex functions is stable under the action of the HJB equation and this result can be derived as a simple consequence of the Prékopa-Leindler inequality. In this talk I will illustrate a probabilistic method based on the analysis of coupling by reflection on a system of forward-backward stochastic differential equations (FBSDEs) that prompts the existence of stable sets for the HJB equation composed of functions that are only "asymptotically convex", but not necessarily convex. If time allows, I will move on to illustrate two consequences of this result to the Schrödinger problem, a.k.a. entropic optimal transport problem. The first is that the optimal coupling satisfies the logarithmic Sobolev inequality and the second one is that Sinkhorn's algorithm converges exponentially fast in the number of iterations to the optimal coupling. Partially based on joint work with A.Durmus and G.Greco

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Assegno di ricerca annuale - One-year post-doc position - Università Ca' Foscari Venezia
by Antonella Basso 30 Jun '23

30 Jun '23

Segnalo il seguente assegno di ricerca presso il Dipartimento di Economia dell’Università Ca’ Foscari Venezia Titolo: Modelli di reti neurali per l’analisi di dati finanziari cross-sectional nel tempo, con applicazione alla valutazione dei prezzi delle abitazioni in Italia Il principale obiettivo del progetto è di studiare l’adattabilità di adeguati modelli a reti neurali ad un contesto dinamico che considera però dati longitudinali e non serie storiche temporali. SSD e/o settore concorsuale: SECS-S/06 Responsabile scientifico e tutor: Prof.ssa Antonella Basso durata: 12 mesi SCADE IL 17/07/2023 ORE 12:00 ORA ITALIANA: Link: https://www.unive.it/data/12138/ -------------------- I would like to point out the following research grant (post-doc) at the Department of Economics of Ca' Foscari University of Venice Subject: Neural networks models for pooled cross-sectional financial data across time, with application to housing pricing in Italy The main goal of the project is to study the adaptability of appropriate neural network models to a dynamical context which considers longitudinal data instead of time series data. Duration: 12 months Deadline: 17/07/2023 at 12:00 Italian time Link: https://www.unive.it/data/12138/ Antonella Basso -- Antonella Basso Dipartimento di Economia Università Ca' Foscari Venezia Fondamenta S. Giobbe - Cannaregio 873 30121 Venezia - Italy Tel. +39-041-2346914 E-mail address:basso@unive.it Web page:https://www.unive.it/data/persone/5591751

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Seminario di Wei Wu in Sapienza il 4 Luglio
by Lorenzo Taggi 29 Jun '23

29 Jun '23

Si comunica che Wei Wu (NYU Shangai) terrà un seminario presso il Dipartimento di Matematica di Sapienza Università di Roma in Sala di Consiglio, Martedì 4 Luglio ore 14:00, dal seguente titolo e abstract: Title: Massless phases for the Villain model in d>=3 Abstract: The XY and the Villain models are models which exhibit the celebrated Kosterlitz-Thouless phase transitions in two dimensions. The spin wave conjecture, originally proposed by Dyson and by Mermin and Wagner, predicts that at low temperature, spin correlations of these models are closely related to Gaussian free fields. I will review the historical background and discuss some recent progress on this conjecture in d>=3. Based on the joint work with Paul Dario (CNRS).

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Expression of interest for postdoc positions
by Daniele Cappelletti 29 Jun '23

29 Jun '23

Dear all, We are asking for expressions of interest in postdoctoral positions that will soon be available at the Polytechnic University of Turin, Polytechnic University of Milan, or Pisa university. The hired postdocs will develop mathematical results in the setting of stochastic reaction networks, which are a family of continuous-time Markov chains with polynomial transition rates extensively used as models in biochemistry. Specifically, the hired postdocs will work on stochastic process convergence, stationary behaviour (existence and characterization), and/or extensions of the classical models to include spatial heterogeneity (stochastic diffusions, processes on a graph, etc). More details on the project can be found here <https://constrained.polito.it/>. To send an expression of interest, please use this form <https://questionari.polito.it/442865?lang=en>. For any further question, please write to constrained(a)polito.it Daniele, Andrea, Luisa

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(PMS)^2 talk - Cazzaniga - July 3 at 17.00
by Carlo Orrieri 27 Jun '23

27 Jun '23

Dear colleagues, We are happy to announce the following hybrid - that is, in person with online streaming - talk: Speaker: Alberto Cazzaniga (Area Science Park) Title: What is the probability that a random symmetric tensor is close to rank-one? Abstract: We address the problem of estimating the probability that a real symmetric tensor is close to rank-one tensors, motivated by the many applications of low-rank approximation. We discuss how the question can be addressed by studying metric invariants of the real Veronese variety thanks to the Weyl's tube formula. We describe the role of the reach and the curvature coefficients with respect to the Bombieri-Weyl metric in obtaining an explicit estimate, and outline the main ideas employed to tackle their calculation. We conclude by discussing some asymptotic results for the case of rational normal curves. Based on joint work with A. Lerario and A. Rosana. Date and time: Monday July 3, 17:00-18:00 (Rome time zone) Place: Laboratorio didattico, dipartimento di matematica dell’università di Pavia, via Ferrata 5, Pavia. Entra nella riunione in Zoom https://us02web.zoom.us/j/81154155086?pwd=Rit2Ymd3eE1lUWIrc0ErQlRMcGNVdz09 <https://us02web.zoom.us/j/81154155086?pwd=Rit2Ymd3eE1lUWIrc0ErQlRMcGNVdz09> ID riunione: 811 5415 5086 Passcode: 317594 This talk is part of the (PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics organized jointly by the universities Milano-Bicocca, Pavia, Milano-Politecnico. Participation is free and welcome! Best regards The organizers (Carlo Orrieri, Maurizia Rossi, Margherita Zanella)

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Seminars in Probability and Finance - Giulia Livieri (LSE London) & Federico Sau (University of Trieste)
by Alberto Chiarini 27 Jun '23

27 Jun '23

========================================================== PADOVA SEMINARS IN PROBABILITY AND FINANCE webpage: http://www.math.unipd.it/~bianchi/seminari/ ========================================================== Dear Colleagues, We would like to invite you to the "Padova seminars in Probability and Finance" this Friday, June 30 starting from 14.30 in Room 2BC30 at the department of Mathematics of the University of Padova. The seminar can also be followed via Zoom from a link to be found at https://www.math.unipd.it/~bianchi/seminari/ This week we will have two contributions: 14:30 - Giulia Livieri (LSE London) 15:30 - Federico Sau (University of Trieste) See further details below. The organizers _____________________________________________________ Speaker: Giulia Livieri (LSE London) Title: Designing Universal Causal Deep Learning Models: The Case of Infinite-Dimensional Dynamical Systems from Stochastic Analysis Abstract: Causal operators (CO), such as various solution operators to stochastic differential equations, play a central role in contemporary stochastic analysis; however, there is still no canonical framework for designing Deep Learning (DL) models capable of approximating COs. This paper proposes a "geometry-aware'" solution to this open problem by introducing a DL model-design framework that takes suitable infinite-dimensional linear metric spaces as inputs and returns a universal sequential DL model adapted to these linear geometries. We call these models Causal Neural Operators (CNOs). Our main result states that the models produced by our framework can uniformly approximate on compact sets and across arbitrarily finite-time horizons Hölder or smooth trace class operators, which causally map sequences between given linear metric spaces. Our analysis uncovers new quantitative relationships on the latent state-space dimension of CNOs which even have new implications for (classical) finite-dimensional Recurrent Neural Networks (RNNs). We find that a linear increase of the CNO's (or RNN's) latent parameter space's dimension and of its width, and a logarithmic increase of its depth imply an exponential increase in the number of time steps for which its approximation remains valid. A direct consequence of our analysis shows that RNNs can approximate causal functions using exponentially fewer parameters than ReLU networks. Speaker: Federico Sau Title: Spectral gap of the symmetric inclusion process Abstract: In this talk, we consider the symmetric inclusion process on a general finite graph. Our main result establishes universal upper and lower bounds for the spectral gap of this interacting particle system in terms of the spectral gap of the random walk on the same graph. In the regime in which the gamma-like reversible measures of the particle system are log-concave, our bounds match, yielding a version for the symmetric inclusion process of the celebrated Aldous'spectral gap conjecture --- originally formulated for the interchange process and proved by Caputo, Liggett and Richthammer (JAMS 2010). Finally, by means of duality techniques, we draw analogous conclusions for an interacting diffusion-like unbounded conservative spin system known as Brownian energy process, which may be interpreted as a spatial version of the Wright-Fisher diffusion with mutation. Based on a joint work with Seonwoo Kim (SNU, South Korea). The Zoom meeting can be joined via the link to be found at https://www.math.unipd.it/~bianchi/seminari/

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June 29 - OWABC seminar - Jonas Arruda and Yannik Shälte
by Massimiliano Tamborrino 27 Jun '23

27 Jun '23

Dear all, the last One World ABC Seminar<https://www.warwick.ac.uk/oneworldabc> of the season is behind the corner! On Thursday, June 29, at 9.30am UK time, Jonas Arruda and Yannik Shälte (University of Bonn) will talk about "Amortized simulation-based inference for non-linear mixed-effects models" with an reported below. Abstract: Non-linear mixed-effects models are a powerful tool for studying heterogeneous populations in biology, medicine, engineering, and other fields. However, fitting these models is computationally challenging when the description of individuals is complex and the population is large. To address this issue, we propose the use of neural density estimation to approximate entity-specific posterior distributions in an amortized fashion. This approximation is then used to efficiently infer population-level parameters. Applying this approach to problems from single-cell biology, we demonstrate its scalability to large datasets in an unprecedented manner. Moreover, it enables accurate uncertainty quantification, simple testing of hypotheses, and extends to stochastic models, going beyond what established methods can give. In summary, our method constitutes a highly flexible novel approach has the potential to substantially improve the analysis of heterogeneous populations. The talk will be hosted on MS Teams here: https://teams.microsoft.com/l/meetup-join/19%3ameeting_OTYyY2FkMWQtZTkwNi00… We are looking forward to seeing you soon, best, Massimiliano on the behalf of the One World ABC Seminar Organisers ------ Dr. Massimiliano Tamborrino Associate Professor Department of Statistics University of Warwick https://warwick.ac.uk/tamborrino

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4 luglio ore 11.00 - Seminario Dott. Lax Chan
by Enea Bongiorno 27 Jun '23

27 Jun '23

Buongiorno, con piacere segnalo il seguente seminario: -------------------------------- 4 luglio 2023 ore 11.00 - aula 101, campus Perrone, via Perrone, 18, Novara. Università del Piemonte Orientale. - on-line: meet.google.com/yvq-ccbt-pzt Title: *Goodness-of-fit test for the Single Functional Index Model* *Dott. Lax Chan* Università del Piemonte Orientale Abstract: An important task in regression analysis is to choose the right specification of the link function that models the dependence structure between the random elements. A challenge arises in the framework of scalar on function regression as the link function is a real-valued operator acting on a functional space, and it is difficult to visualize and hence select a coherent specification. A specification test that uses a semi-parametric approach is proposed, in particular by exploiting the Single Functional Index Model. The test statistic is a special form of U-statistic; its asymptotic null distribution is derived under suitable assumptions, and consistency is proved for a specific class of alternatives. The finite sample performances of the test are evaluated through a simulation study using both asymptotic p-values and some bootstrap approaches. An application of the method developed to a problem commonly arises in the food industry is performed to demonstrate the potentialities of the method. ----------------------------------- Locandina dell'evento <https://drive.google.com/file/d/1C-aG-f1Ml66CMNIxfcQnKD0n7O3oH83r/view?usp=…> Seminari Matematici Statistici <https://sites.google.com/uniupo.it/seminari-ms/home-page> ----------------------------------- Tutti gli interessati sono invitati a partecipare. Cordiali saluti, Enea -- Enea Bongiorno,PhD Associate Professor of Statistics Università degli Studi del Piemonte Orientale Via Perrone 18, 28100, Novara, Italia Phone: +390321375317 enea.bongiorno(a)uniupo.it upobook.uniupo.it/enea.bongiorno

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