January 2025 - Random - Mailing list — Dipartimento di Matematica, UniPI

5th Spring Colloquium on Probability and Finance - Padova - 19 April 2024
by Claudio Fontana 02 Apr '25

02 Apr '25

Dear all, We are glad to announce the 5TH SPRING COLLOQUIUM ON PROBABILITY AND FINANCE, held at the Department of Mathematics "Tullio Levi-Civita" of the University of Padova, on APRIL 19TH, 2024. The Colloquium will bring together researchers in stochastic analysis and mathematical finance. The workshop will start at 10am and end at 5pm. Attendance is free but registration is required (on the conference website). Please note that, due to the small capacity of the conference room, we will be able to host only a limited number of attendees. WEBSITE: https://events.math.unipd.it/SpringColloquium5 INVITED SPEAKERS: - Eduardo ABI JABER (École Polytechnique, FR) - Huy Ngoc CHAU (University of Manchester, UK) - Giulia DI NUNNO (University of Oslo, NR) - Roxana DUMITRESCU (King's College London, UK) - David SKOVMAND (University of Copenhagen, DK) - Luca TASCHINI (University of Edinburgh, UK) We hope to see you in Padova! Best wishes, Giorgia Callegaro and Claudio Fontana

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Workshop TuBA, 28-30 April 2025
by Umberto PAPPALETTERA 31 Jan '25

31 Jan '25

Dear all, We are glad to announce the 2nd edition of the workshop "Turbulence on the Banks of the Arno", to be held at Scuola Normale Superiore in Pisa (Italy) from the 28th of April to the 30th of April 2025. The goal of the workshop is to provide a platform for early-stage researchers (ideally Ph.D. students and postdoctoral fellows) working in the field of turbulence to come together, exchange ideas, and present their own research. The workshop will also feature two lecture series, delivered by Professors Theodore D. Drivas and Alexei A. Mailybaev. More details are available at the web page: https://indico.sns.it/e/ <https://indico.sns.it/event/62/>tuba Please notice that registration to the event is free but mandatory. The deadline for registration is *February 16th 2025*. Accommodation in Pisa free of charge and additional remboursement for travel expenses may be granted upon request. Please feel free to circulate this message to anybody who might be interested. Looking forward to seeing you in Pisa, The organizers, Franco Flandoli, Federico Butori, Eliseo Luongo, Silvia Morlacchi, Umberto Pappalettera

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PhD opportunity at University of Oslo
by Giulia Di Nunno 31 Jan '25

31 Jan '25

Dear All, Exciting PhD opportunity in the group of Risk and Stochastics at the Department of Mathematics, University of Oslo. All information can be found here: https://www.jobbnorge.no/en/available-jobs/job/274312/phd-research-fellow-i… Deadline for application February 28, 2025 Please help us distribute this information widely. Best regards, Giulia Di Nunno Professor Risk and Stochastics Department of Mathematics University of Oslo, Norway

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Seminario Padova - Paul Nikolaev
by alekos.cecchin＠unipd.it 31 Jan '25

31 Jan '25

Buongiorno a tutti, Vorremmo segnalarvi che venerdì prossimo (7 Febbraio) in aula 2BC60 (Torre Archimede, Università di Padova) ci sarà un seminario per il ciclo di seminari in Probabilità e Finanza di: Paul Nikolaev (Università di Padova) Title: Mean Field Limit for Stochastic Particle Systems With and Without Common Noise: An Analysis of Singular Interactions Date: February 7, 2025, at 14:00, room 2BC60 Abstract: We investigate systems driven by idiosyncratic noise, as well as those influenced by both idiosyncratic and common noise, the latter being particularly relevant in fields such as biology and finance. For both types of systems, we establish mean-field limit results. Our primary objective is to address interaction kernels with low regularity, thereby extending the classical Lipschitz framework. This includes applications to attractive Keller–Segel models, opinion dynamics, and general sub-Coulomb-type kernels. Our approach utilizes techniques from PDE's, such as relative entropy methods. The overarching goal is to provide a comprehensive overview of the recently developed methods that effectively address singular kernels. Vi aspettiamo numerosi! Alberto Chiarini e Alekos Cecchin

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grants for master studies in Paris : deadline approaching
by CRISTINA TONINELLI 31 Jan '25

31 Jan '25

—— Dear colleagues, The international call for applications for FSMP's master scholarships program Paris Graduate School for Mathematical Sciences (PGSM), for academic year 2025-2026, is still open until Thursday February 6th 2025 (at 11:59 p.m., Paris time). Feel free to circulate this message to your contacts. Offer description: https://sciencesmaths-paris.fr/en/pgsm-master Applications only via the online form: https://applications.sciencesmaths-paris.fr/en/call-for-pgsm-master-893.htm Best regards, [cid:2ca5f34c-f952-41af-b074-b585c28ea03b]

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SPASS Seminar: Josué Knorst
by Francesco Grotto 30 Jan '25

30 Jan '25

Dear Colleagues, We would like to invite you to the following SPASS seminar, jointly organized by UniPi, SNS, UniFi and UniSi: *Quantitative particle approximation of nonlinear stochastic Fokker-Planck equations with singular kernel* by Josué Knorst (ENSTA-Paris, UNICAMP) The seminar will take place TUE, 4.2.2025 at 14:00 CET in Aula Magna, Dipartimento di Matematica, UNIPI and streamed online at the link below. The organizers, G. Bet, A. Caraceni, F. Grotto, G. Zanco https://sites.google.com/unipi.it/spass *---------------------------------------------------------* *Abstract: * We derive quantitative estimates for stochastic systems of particles moderately interacting via singular kernels and perturbed by both idiosyncratic and environmental noises. The moderate interaction regime is a scale introduced by Oelschläger in the 80s, and it lies between the mean field and the nearest neighbor interaction regimes. We prove that the (mollified) empirical process converges to the solution of the nonlinear stochastic Fokker-Planck equation. The proof is based on Itô’s formula for the norm of a H^1_q-valued process, commutator estimates, and some estimations for the regularization of the empirical measure. Joint work with C. Olivera and A. de Souza.

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Fwd: Postdoctoral positions in Mathematics at NYU Shanghai
by Silvestri, Vittoria 30 Jan '25

30 Jan '25

Ricevo e inoltro volentieri. Vittoria ******************************** Vittoria Silvestri Assistant Professor Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome ******************************** ---------- Forwarded message --------- Da: Pierre Michel Tarres <tarres(a)nyu.edu> Date: gio 30 gen 2025 alle ore 11:07 Subject: Postdoctoral positions in Mathematics at NYU Shanghai To: Pierre Michel Tarres <tarres(a)nyu.edu> Dear friends and colleagues, The New York University at Shanghai is advertising two-year postdoctoral positions <https://shanghai.nyu.edu/about/work/fellowships> at in mathematics, potentially renewable for an additional year. The salary is very competitive, and the teaching load is rather low. Please see ad below for the detailed conditions, and in order to apply <https://apply.interfolio.com/153589.>. The main scientific themes include theories and applications of Probability, Partial Differential Equations, and Applied Mathematics, although different research interests will also be considered, especially if they fit the themes of the NYU-ECNU Institute of Mathematics at NYU Shanghai <https://research.shanghai.nyu.edu/centers-and-institutes/math/people>. Our tenured/tenure-track Faculty and regular visitors include Hong-Bin Chen <https://www.ihes.fr/~hbchen/> (starting in the Fall 25), Roberto Fernandez <https://shanghai.nyu.edu/academics/faculty/directory/roberto-fernandez>, Mac Huang <https://shanghai.nyu.edu/academics/faculty/directory/jinzi-mac-huang> , Mathieu Laurière <https://shanghai.nyu.edu/academics/faculty/directory/mathieu-lauriere>, Fanghua Lin <https://shanghai.nyu.edu/academics/faculty/directory/fanghua-lin>, Shuyang Ling <https://shanghai.nyu.edu/academics/faculty/directory/shuyang-ling>, Yuning Liu <https://shanghai.nyu.edu/academics/faculty/directory/yuning-liu>, Vahagn Nersesyan <https://shanghai.nyu.edu/academics/faculty/directory/vahagn-nersesyan>, Alejandro Ramirez <https://shanghai.nyu.edu/academics/faculty/directory/alejandro-ramirez>, Wei-Min Wang <https://shanghai.nyu.edu/academics/faculty/directory/wei-min-wang>, Wei Wu <https://shanghai.nyu.edu/academics/faculty/directory/wei-wu>, Zhuo-Cheng Xiao <https://shanghai.nyu.edu/academics/faculty/directory/zhuo-cheng-xiao> , Shengkui Ye <https://shanghai.nyu.edu/academics/faculty/directory/shengkui-ye> and Jun Zhang <https://shanghai.nyu.edu/academics/faculty/directory/jun-zhang>. We also often receive Visiting Professors for one semester or one year. Please do not hesitate to contact me if you have any questions. Best regards, Pierre ------------------------------------------------------------------------------------------------------------- NYU Shanghai is currently accepting applications for several postdoctoral fellow positions in Mathematics, with appointments starting preferably in Spring or Fall 2025 (pending budgetary approval). The fellows will be part of the Mathematics area at NYU Shanghai, which operates in collaboration with the Courant Institute and interacts with East China Normal University. The areas of expertise of possible mentors in the group are mainly Probability Theory, Partial Differential Equations, and Applied Mathematics. However, exceptional candidates with different research interests will also be considered. Successful applicants should hold a Ph.D. in Mathematics or a closely related discipline at the time of appointment. Postdoctoral positions are commonly offered for two years, and are potentially renewable for an additional year; they incur a teaching load of two recitations per semester. Terms of employment at NYU Shanghai are comparable to NYU New York and other U.S. institutions. Applicants will submit a cover letter, curriculum vitae, a statement on current/future research interests, a statement of teaching interests, and a list of their publications via Interfolio. Additionally, applicants should enter the names and email addresses of at least three referees. Each referee will be contacted to upload a reference letter through Interfolio. Review of applications will begin immediately and will continue until the positions are filled. To apply, follow this link: https://apply.interfolio.com/153589. If you have any questions, please email the NYU Shanghai NY Office of Faculty Recruitment at shanghai.faculty.recruitment(a)nyu.edu. About NYU Shanghai: NYU Shanghai is the third degree-granting campus within New York University’s Global Network. It is the first higher education joint venture in China authorized to grant degrees that are accredited in the U.S. as well as in China. All teaching is conducted in English. A research university with liberal arts and science at its core, NYU Shanghai resides in one of the world's great cities with a vibrant intellectual community. NYU Shanghai recruits scholars of the highest caliber who are committed to NYU's global vision of transformative teaching and innovative research and who embody the global society in which we live. NYU’s Global Network includes degree-granting campuses in New York, Shanghai, and Abu Dhabi, complemented by thirteen additional academic centers across the world. Faculty and students may circulate within the network in pursuit of common research interests and cross-cultural, interdisciplinary endeavors, both local and global. For people in the EU, click here for information on your privacy rights under GDPR: www.nyu.edu/it/gdpr. NYU Shanghai is an equal opportunity employer committed to equity, diversity, and social inclusion. We strongly encourage applications from under-represented individuals in the profession, across color, creed, race, ethnic and national origin, physical ability, and gender and sexual identity. NYU Shanghai affirms the value of differing perspectives on the world as we strive to build the strongest possible university with the widest reach.

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Postdoc a Brest
by lorenzo zambotti 29 Jan '25

29 Jan '25

Ricevo e inoltro %------------------------------------% I have some funding for a 2-year postdoc position (no teaching, 2.4k€ net per month), for anyone interested in working on singular SPDEs - project funded by the ANR (National Agency of Research) within the setting of the project 'Smooth <http://lmba.math.univ-brest.fr/perso/ismael.bailleul/ANRSmooth.html>', that involves as well N. Burq <https://www.imo.universite-paris-saclay.fr/~nicolas.burq/>, V. Dang <https://webusers.imj-prg.fr/~nguyen-viet.dang/>, A. Deya <https://iecl.univ-lorraine.fr/membre-iecl/deya-aurelien/>, C. Labbe <https://perso.lpsm.paris/~clabbe>, T. Robert <https://iecl.univ-lorraine.fr/membre-iecl/robert-tristan/>, L. Thomann <https://iecl.univ-lorraine.fr/membre-iecl/thomann-laurent/>, N. Tzvetkov <https://tzvetkov.perso.math.cnrs.fr/>, C. Sun <https://sites.google.com/view/chenminsun/> L. Zambotti <https://www.lpsm.paris/users/zambotti/index>. The application process is simple: send (CV + cover letter) to Nikolay Tzvetkov (nikolay.tzvetkov(a)ens-lyon.fr) and myself. Can you please forward this information to anyone you think may be interested by this opportunity? Thanks Best regards Ismaël Bailleul <ismael.bailleul(a)univ-brest.fr> %------------------------------------% -- Lorenzo Zambotti Postal Address: Sorbonne Universite', LPSM - Boite courrier 158 4, place Jussieu - 75252 Paris cedex 05, France Bureau n. 22, 2eme etage, tours 16/26, Jussieu E-mail: lorenzo.zambotti(a)upmc.fr https://www.lpsm.paris/users/zambotti/index

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Stefano Favaro at Tor Vergata 05.02
by Michele Salvi 29 Jan '25

29 Jan '25

Dear all, On Wednesday, February 5th, at 14h00 in Aula Dal Passo of Tor Vergata Math Department, RoMaDS <https://www.mat.uniroma2.it/~rds/events.php> will host Stefano Favaro (Università di Torino) with the seminar “A smoothed-Bayesian approach to frequency recovery from sketched data” Abstract: We introduce a novel statistical perspective on a classical problem at the intersection of computer science and information theory: recovering the empirical frequency of a symbol in a large discrete dataset using only a compressed representation, or sketch, obtained via random hashing. Departing from traditional algorithmic approaches, recent works have proposed Bayesian nonparametric (BNP) methods that can provide more informative frequency estimates by leveraging modeling assumptions on the distribution of the sketched data. In this paper, we propose a smoothed-Bayesian method, inspired by existing BNP approaches but designed in a frequentist framework to overcome the computational limitations of the BNP approaches when dealing with large-scale data from realistic distributions, including those with power-law tail behaviors. For sketches obtained with a single hash function, our approach is supported by frequentist guarantees, including unbiasedness and optimality under a squared error loss function within a class of linear estimators. For sketches with multiple hash functions, we introduce an approach based on multi-view learning to construct computationally efficient frequency estimators. We validate our method on synthetic and real data, comparing its performance to that of existing alternatives. Joint work with Mario Beraha (Politecnico di Milano) and Matteo Sesia (University of Southern California) We encourage in-person partecipation. Should you be unable to come, here is the link to the Teams streaming: https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw…"Tid"%3a"24c5be2a-d764-40c5-9975-82d08ae47d0e"%2c"Oid"%3a"650fc4a8-4cec-4bd2-87bc-90d134074fe6"} <https://teams.microsoft.com/l/meetup-join/19%3arfsL73KX-fw86y1YnXq2nk5VnZFw…> The seminar is part of the Excellence Project MatMod@TOV.

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Seminario PRISMA lun 3 feb 2025
by Francesco Caravenna 28 Jan '25

28 Jan '25

Seminari on-line del gruppo UMI - PRISMA (http://www.umi-prisma.polito.it/) I seminari PRISMA hanno un formato di "colloquium" per creare un'occasione di scambio e discussione con tutta la comunità dei probabilisti e statistici italiani. Ogni giornata comprende due relatori che tengono due seminari di 30 minuti strettamente connessi, per presentare alla comunità una prospettiva sul proprio ambito di ricerca. Da quest'anno le registrazioni dei seminari vengono pubblicate sul canale YouTube dell'UMI: https://youtube.com/playlist?list=PLmySpc-jrtAMq84VH71evyqPc1hl6eEQb Il prossimo appuntamento è per lunedì 3 febbraio 2025. I relatori saranno Giambattista Giacomin (Università di Padova) e Marco Zamparo (Università del Piemonte Orientale) che parleranno di Transizioni di fase in modelli di pinning ed effetto del disordine con il seguente orario: 16:00 Primo seminario 16:30 Pausa e discussione 16:45 Secondo seminario 17:15 Conclusione e discussione Trovate di seguito il riassunto. I seminari verranno trasmessi via Zoom al seguente link: https://uniroma1.zoom.us/j/88679569146 Meeting ID: 886 7956 9146 Vi aspettiamo numerosi! Valentina Cammarota e Francesco Caravenna %%%%%%%%%%%%%%%%%%%%%%%%%%%% RELATORI: Giambattista Giacomin (Università di Padova) e Marco Zamparo (Università del Piemonte Orientale) TITOLO: Transizioni di fase in modelli di pinning ed effetto del disordine. RIASSUNTO: Il modello di pinning è un modello elementare della meccanica statistica che presenta una transizione di (de)localizzazione. Questo modello è stato molto considerato nella letteratura fisica e biofisica poiché emerge naturalmente nella modellizzazione di una varietà di fenomeni e perché, in assenza di disordine, è esattamente risolubile. In termini matematici il modello di pinning è una misura di Gibbs con potenziali a un corpo basata su un processo di rinnovo discreto. Nella prima parte del seminario introduciamo il modello e presentiamo lo stato dell’arte sull’effetto del disordine, esponendo anche alcuni progressi recenti e menzionando alcuni problemi aperti. Nella seconda parte discutiamo invece delle varianti del modello di pinning in cui la densità dell’insieme dei punti di rinnovo è imposta al sistema tramite condizionamento o tramite dei potenziali aggiunti al modello: questo tipo di modelli è stato proposto in biofisica per lo studio del DNA circolare. In questo contesto una nuova fase, intermedia tra la fase localizzata e quella delocalizzata, appare, almeno in assenza di disordine. La comparsa di questa nuova fase è una versione di un fenomeno ben noto in probabilità, dove una singola variabile è responsabile delle grandi fluttuazioni della somma di tante sue copie (« big jump phenomenon »). La presenza del disordine ha un effetto molto drastico su questa fase: spieghiamo infatti che la fase intermedia non esiste se introduciamo del disordine, anche debole. %%%%%%%%%%%%%%%%%%%%%%%%%%%%

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