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Politecnico di Milano- Seminario M. Sesia
by Laura Maria Sangalli 15 Sep '23

15 Sep '23

Si avvisa che in data 21-09-2023, alle ore 14:30 precise presso il Politecnico di Milano, in aula 16B.2.1, nell’ambito delle attività del MOX, si svolgerà il seguente seminario: Sesia Matteo, University of Southern California Titolo: Adaptive conformal classification with noisy labels Abstract: This work develops novel conformal prediction methods for classification tasks that can automatically adapt to random label contamination in the calibration sample, enabling more informative prediction sets with stronger coverage guarantees compared to state-of-the-art approaches. This is made possible by a precise theoretical characterization of the effective coverage inflation (or deflation) suffered by standard conformal inferences in the presence of label contamination, which is then made actionable through new calibration algorithms. Our solution is flexible and can leverage different modeling assumptions about the label contamination process, while requiring no knowledge about the data distribution or the inner workings of the machine-learning classifier. The advantages of the proposed methods are demonstrated through extensive simulations and an application to object classification with the CIFAR-10H image data set. Reference: http://export.arxiv.org/abs/2309.05092 Il link per seguire il seminario online sarà reso disponibile pochi minuti prima dell’avvio del seminario al seguente Link: https://mox.polimi.it/mox-seminars/?id_evento=2315 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 (+39) 02 2399 4554 laura.sangalli(a)polimi.it<mailto:laura.sangalli@polimi.it> https://sangalli.faculty.polimi.it

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seminario SMS - Trevisani (Universitade da Coruña and CITIC)
by Elena Issoglio 13 Sep '23

13 Sep '23

Cari colleghi, vi segnalo il prossimo seminario della serie Stochastics and Mathematical Statistics (SMS) https://sites.google.com/view/torinostochastics/home-page *Data:* *Mer 20 Settembre *alle ore* 14.00-15.00* *Luogo*: *Aula C*, Palazzo Campana, Via Carlo Alberto 10, Torino *Speaker:** Davide Trevisani* (Universitade da Coruña and CITIC) *Titolo*: A brief introduction to XVA and KVA *Abstract**: * Differently from some financial asset classes whose risks can belong to a wide market segment, many derivatives are closely tied to counterparty risk. Already at the end of ’90s, and definitively with the great crisis of 2007-2008, quantifying such risk gained great importance in financial industry. However, nowadays, institutions are not merely concerned with coping with default events but also with the expenses associated with such risks. These expenditures are primarily driven by regulatory requirements and contractual obligations. Quantifying these costs is the aim of Value Adjustments (XVAs). In this talk, we briefly present the mathematical framework of market with dividends. We then examine a pricing model with KVA (Capital Value Adjustment). Si invitano tutti gli interessati a partecipare. Cordialmente Elena (a nome degli organizzatori Bruno Toaldo, Elena Issoglio) *----------------------------------------------* *Dr Elena Issoglio* *Assistant Professor in Probability **(RTD-B)* *Department of Mathematics "G. Peano", **University of Torino* *Via Carlo Alberto 10, **10123, Torino, **Italy* *webpage: **https://sites.google.com/view/elenaissoglio/home <https://sites.google.com/view/elenaissoglio/home>* *webex personal room: **https://unito.webex.com/meet/elena.issoglio <https://unito.webex.com/meet/elena.issoglio>* *----------------------------------------------*

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DEMS Bicocca Statistics seminar - Victor M. Panaretos - September 27th at 12 pm
by Alessia Caponera 13 Sep '23

13 Sep '23

Dear colleagues, We are pleased to announce the seminar of Victor M. Panaretos (EPFL), on *Wednesday the* *27th of September at 12:00 pm*, at the University of Milano-Bicocca, Department of Management, Economics, and Statistics (DEMS). The seminar will be held in presence at the DEMS seminar room 2104 (building U7 Civitas, 2nd floor). ******************************************************* *Time: *Wednesday September 27th, at 12:00 pm *Place: *University of Milano-Bicocca | DEMS | Room 2104 (building U7 Civitas, 2nd floor) *Title: *Graphical Models for Stochastic Processes *Speaker:* Victor M. Panaretos (Institute of Mathematics, EPFL) *Abstract:* Graphical models allow us to distinguish direct and indirect associations in data. They can be used as models or they can be the targets of inference, and have been extensively studied in many contexts, the most recent emphasis being in high-dimensional statistics. For the most part, one considers a collection of random vectors indexed by a finite or discrete set. The purpose of this talk is to explore what happens when we are interested in the associations within and between stochastic processes. In the first case, we are dealing with graphical models with uncountable rather than discrete index set. In the latter case, we are dealing with graphical models for finite collections of function-valued random variables. Such settings introduce conceptual challenges owing to the lack of infinite-dimensional analogues of familiar algebraic tools, such as matrix inverses and determinants. It will turn out that the two problems share commonalities but also notable differences. Based on joint work with Kartik Waghmare (EPFL) and Tomas Masak (EPFL). ******************************************************* Best wishes, Alessia Caponera

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SPASS Seminars: Giuseppe Cannizzaro and Giacomo di Gesù
by Francesco Grotto 13 Sep '23

13 Sep '23

Dear Colleagues, We would like to invite you to the following (double) SPASS seminar, jointly organized by UniPi, SNS, UniFi and UniSi (abstracts below): *Weak coupling scaling of critical SPDEs* by *Giuseppe Cannizzaro *(University of Warwick) *Sharp asymptotics for the Allen-Cahn equation in the limit of small noise and large volume* by* Giacomo di Gesù* (La Sapienza) The seminars will take place on *TUE, 19.9.2023* respectively at *14:00 CET and 15:00 CET *in Aula Seminari, Dipartimento di Matematica, University of Pisa and streamed online at the link below. The organizers, A. Agazzi, G. Bet, A. Caraceni, F. Grotto, G. Zanco https://sites.google.com/unipi.it/spass <https://www.google.com/url?q=https://sites.google.com/unipi.it/spass&source…> -------------------------------------------- *Weak coupling scaling of critical SPDEs* Abstract: The study of stochastic PDEs has known tremendous advances in recent years and, thanks to Hairer's theory of regularity structures and Gubinelli and Perkowski's paracontrolled approach, (local) existence and uniqueness of solutions of subcritical SPDEs is by now well-understood. The goal of this talk is to move beyond the aforementioned theories and present novel tools to derive the scaling limit (in the so-called weak coupling scaling) for some stationary SPDEs at the critical dimension. Our techniques are inspired by the resolvent method developed by Landim, Olla, Yau, Varadhan, and many others, in the context of particle systems in the supercritical dimension and might be well-suited to study a much wider class of statistical mechanics models at criticality. *Sharp asymptotics for the Allen-Cahn equation in the limit of small noise and large volume* Abstract: We consider the Allen-Cahn equation on a finite interval perturbed by space-time white noise. Keeping the size of the spatial domain fixed, the dynamics becomes metastable in the limit of vanishing noise. I will review some sharp metastability estimates in this regime and discuss how the invariant measure and long-time behavior is affected if one allows the system size to grow while the noise vanishes (joint work with L. Bertini and P. Buttà).

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Call of interest - 2 postdoc positions funded by PRIN/MUR
by Maurizia Rossi 12 Sep '23

12 Sep '23

Dear all, this is a "call of interest" for two postdoctoral positions (assegni di ricerca), related to the PRIN/MUR project 2022 GRAFIA "Geometry of random fields", that will soon be available at the University of Rome Tor Vergata (1 position) and Milano-Bicocca (1 position). The aim of the project is the investigation of several issues in the area of random fields, including the time-dependent case and focussing also on interactions with statistics, geometry and functional analysis. The project is motivated by a variety of applications in different areas, such as cosmology and astrostatistics, climate sciences, machine learning and neural networks. Expressions of interest can be sent to Domenico Marinucci ( marinucc(a)mat.uniroma2.it) and Maurizia Rossi (maurizia.rossi(a)unimib.it) Best regards, Valentina Cammarota, Domenico Marinucci, Maurizia Rossi -- Maurizia Rossi Associate Professor in Probability Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca https://mauriziarossi.wordpress.com

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Post-doc in Luxembourg
by Giovanni Peccati 11 Sep '23

11 Sep '23

Dear Colleagues, I would like to recall 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. (The deadline for applications is *September 15th*, but I might decide to extend it a little longer.) 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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AVVISO DI SEMINARIO
by Barbara Martinucci 10 Sep '23

10 Sep '23

UNIVERSITA' DI SALERNO Dipartimento di Matematica *AVVISO** DI SEMINARIO* La Prof.ssa *Giulia DI NUNNO* (University of Oslo, Department of Mathematics) mercoledì 13 settembre, alle ore 13:00, presso la Sala Riunioni dell'Edificio F2 (piano 1, stanza 36), terrà un seminario dal titolo: *Sandwich volatility modelling and hedging* Gli interessati sono cordialmente invitati a partecipare, *Antonio Di Crescenzo* *Barbara Martinucci* *Alessandra Meoli**Serena Spina* Link su Teams: https://teams.microsoft.com/l/meetup-join/19%3ameeting_OTcwY2Q1ZDktYmIyMS00… *Abstract* Sandwiched Volterra Volatility (SVV) models are a class of models able to capture both the long memory and the rough aspects of volatility. We present the structure and the properties. We then move to consider hedging and consider the explicit computation of quadratic hedging strategies. the theoretical solution is well-known in terms of the non-anticipating derivative for all square integrable claims, the fact that these models are typically non-Markovian provides a concrete difficulty in the direct computation of conditional expectations at the core of the explicit hedging strategy. To overcome this difficulty, we propose a Markovian approximation of the model which stems from an adequate approximation of the kernel in the Volterra noise. We show some numerical simulations performed with different methods.

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Workshop announcement "Turbulence on the Banks of Arno", SNS Pisa
by Franco Flandoli 10 Sep '23

10 Sep '23

Dear all, We are glad to announce the 1st edition of the workshop "Turbulence on the Banks of Arno", to be held at Scuola Normale Superiore in Pisa (Italy) from the 31st of January to the 2nd of February 2024. 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 Jeremie Bec and Michele Coti Zelati. 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 *November 15th 2023*. Accommodation in Pisa will be provided free of charge for all participants, 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, Eliseo Luongo, Silvia Morlacchi, Andrea Papini, Umberto Pappalettera

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Workshop “Replicability crisis in science?”,University of Padua, Italy, 19 September 2023
by Susi Ceron 08 Sep '23

08 Sep '23

Dear All, it is a pleasure to announce the Workshop “Replicability crisis in science?” University of Padua, Italy, 19 September 2023 Speakers: Prof. Giovanni Parmigiani, Department of Data Science, Dana Farber Cancer Institute, Harvard University, USA (https://scholar.harvard.edu/parmigiani) Prof. Branden Fitelson, Department of Philosophy and Religion, Northeastern University, USA (https://cssh.northeastern.edu/faculty/branden-fitelson/) Prof. Gianmarco Altoè, Department of Developmental Psychology and Socialisation, University of Padua (https://www.dpss.unipd.it/en/gianmarco-altoe) Prof. Alessandra Salvan, Department of Statistical Sciences, University of Padua (https://homes.stat.unipd.it/alessandrasalvan/en/home-2/) Prof. Marzia Soavi, Department of Philosophy, Sociology, Education and Applied Psychology, University of Padua (https://www.unipd.it/en/contatti/rubrica?detail=Y&ruolo=1&checkout=cerca&pe… <https://www.unipd.it/en/contatti/rubrica?detail=Y&ruolo=1&checkout=cerca&pe…>) Workshop content: When evaluating the reliability of scientific findings and predictions, a major concern is about their replicability, that is their consistency across different studies aimed at answering the same question. A ‘replicability crisis’ has been claimed in the last decades, denouncing that a large part of published research findings, especially in applied sciences, such as psychology or medicine failed to be confirmed by subsequent studies. Difficulties in moving from empirical evidence and data analysis to a scientific result push towards the need to clarify various aspects, such as rigorous definitions, the possible tools for understanding and communicating the uncertainty inherent in most scientific conclusions, the definition of non-questionable research practices. Workshop Website: https://replicabilityday.stat.unipd.it Registration: Registration for the workshop is now open on Eventbrite <https://www.eventbrite.it/e/biglietti-replicability-crisis-in-science-68647…>. Organizers: Department of Statistical Sciences, University of Padova, Italy: Alessandra Salvan and Bruno Scarpa Department of Philosophy, Sociology, Education and Applied Psychology, University of Padova, Italy: Massimiliano Carrara and Fabio Grigenti Further details can be found at https://replicabilityday.stat.unipd.it or contact Bruno Scarpa (scarpa(a)stat.unipd.it) Info: replicability(a)stat.unipd.it The workshop has been organised together with the twin event of the Summer school on “Replicability crisis in science?” <https://replicability.stat.unipd.it> -- Segreteria Amministrativa Dipartimento di Scienze Statistiche Università degli Studi di Padova Via Cesare Battisti 241 - 35121 Padova tel. +39 049 8274125 www.stat.unipd.it <http://www.stat.unipd.it/>

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call Secondo Incontro UMI per Dottorandi
by Claudia Ceci 07 Sep '23

07 Sep '23

Buongiorno a tutt*, segnalo che è aperta la call per i dottorandi e neo-dottorati in tutti gli ambiti della matematica e applicazioni per presentare una comunicazione al Secondo Incontro UMI per Dottorandi, che si svolgerà a Napoli il 13 e 14 giugno 2024: https://umi.dm.unibo.it/2023/09/05/call-ii-incontro-umi-dottorandi/ Vi prego di darne diffusione ai potenziali interessati. Cari saluti Claudia Ceci **************************************************************************** Claudia Ceci Dipartimento di Metodi e Modelli per l’Economia, il Territorio e la Finanza (MEMOTEF) Università di Roma La Sapienza Via Del Castro Laurenziano 9 Roma 00161 Italy Email: claudia.ceci(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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