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Seminar in Statistics - MATTEO SESIA
by Pierpaolo De Blasi 07 May '23

07 May '23

SEMINARS IN STATISTICS @ COLLEGIO CARLO ALBERTO <https://www.carloalberto.org/events/category/seminars/seminars-in-statistic…> Giovedi 11 Maggio 2023, alle ore 12.00, presso il Collegio Carlo Alberto, in Piazza Arbarello 8, Torino, si terrà il seguente seminario: ------------------------------------------------ Speaker: *Matteo Sesia* (University of Southern California) Title: *Testing for outliers with conformal p-values* Abstract: This talk discusses the construction of provably valid frequentist p-values for nonparametric outlier detection, taking a multiple-testing perspective. The goal is to test whether new independent samples belong to the same distribution as a reference data set or are outliers. We study a solution based on conformal inference, a broadly applicable framework which yields p-values that are marginally valid in finite samples but are mutually dependent for different test points. We prove these p-values are positively dependent and enable exact false discovery rate control, although in a relatively weak marginal sense. We then introduce a new method to compute p-values that are both valid conditionally on the training data and independent of each other for different test points; this paves the way to stronger type-I error guarantees. Finally, we discuss how to further boost power by leveraging a separate data set of known outliers with an approach inspired by weighted hypothesis testing. The practical relevance of our results is demonstrated by numerical experiments on real and simulated data. ------------------------------------------------ Sarà possibile seguire il seminario anche in streaming: Join Zoom Meeting <https://us02web.zoom.us/j/88278987175?pwd=NXhNM3dYd1hrT0JMT2p1N2syU1J2dz09> Il seminario è organizzato dalla "de Castro" Statistics Initiative www.carloalberto.org/stats -- Pierpaolo De Blasi University of Torino & Collegio Carlo Alberto carloalberto.org/pdeblasi <https://sites.google.com/a/carloalberto.org/pdeblasi/>

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Webinar Prisma 8 maggio Beghin-Cammarota
by Claudia Ceci 06 May '23

06 May '23

Buongiorno a tutt* ho il piacere di annunciare il prossimo webinar del ciclo di seminari online promosso dal Gruppo UMI PRISMA (http://www.umi-prisma.polito.it/index.html). *Lunedì 8 maggio 2023* *ore 16-17 Luisa Beghin * *Title*: Non-local differential operators in probability *Abstract* The study of nonlocal differential operators is an active field of research in pure and applied mathematics and has been drawing increasing attention over the last few years. Fractional-order operators (i.e. integrals and derivatives of non-integer order) are maybe the most famous and studied in the literature. Their origin goes back to the end of the seventeenth century, but only recently they have been applied to a variety of fields ranging from biology to engineering, probability theory, physics, image processing among others. In this talk, we will concentrate our attention on the stochastic applications of non-local operators, in particular in the theory of anomalous diffusions and renewal processes. *ore 17-18 Valentina Cammarota* *Title*: On the Correlation of Critical Points and Angular Trispectrum for Random Spherical Harmonics. *Abstract* We prove a Central Limit Theorem for the Critical Points of Random Spherical Harmonics, in the High-Energy Limit. The result is a consequence of a deeper characterizations of the total number of critical points, which are shown to be asymptotically fully correlated with the sample trispectrum, i.e., the integral of the fourth Hermite polynomial evaluated on the eigenfunctions themselves. As a consequence, the total number of critical points and the nodal length are fully correlated for random spherical harmonics, in the high-energy limit. Qui di seguito il link per la partecipazione: https://teams.microsoft.com/l/meetup-join/19%3ad186a45e5730441d9b85bc117124… 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

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Fwd: RISM VII - first announcement
by Gianmario Tessitore - UNIMIB 05 May '23

05 May '23

---------- Forwarded message --------- Da: Daniela Riccio <daniela.riccio(a)polimi.it> Date: gio 27 apr 2023 alle ore 19:30 Subject: RISM VII - first announcement To: Daniela Riccio <daniela.riccio(a)polimi.it> Cc: Daniela Riccio <daniela.riccio(a)polimi.it> Dear Colleagues, this is the first announcement of the upcoming seventh RISM School which will focus on the topic “Exotic solutions and well posedness of ODE's and PDE's” directed by Luigi Ambrosio, recipient of the Riemann Prize 2022. It will take place in Varese during the week July 10-14, 2023 at the Riemann International School of Mathematics, Università degli Studi dell’Insubria, within the Riemann Prize Week celebrations. The school will culminate on Friday 14th with the Riemann Prize ceremony at the aula magna of the main Rector building in Varese center and the Riemann Lecture by Luigi Ambrosio. Please find further details at the link www.rism.it You are kindly asked to forwarding this message towards your Institution and to all possible interested people. The school will consist of two courses: *Franco Flandoli* *Regularisation by noise for ODEs and PDEs;* *Dallas Albritton * *Self-similarity, singularity, and non-uniqueness in partial differential equations of fluids dynamics* and a series of talks aimed at presenting recent advances and challenges of contemporary research in the field. Interested people can register at the link RISM VII - registration <https://www.rism.it/events/riemann-prize-week-2023> IMPORTANT: PhD students, young researchers and postdocs are invited to applying for financial support towards lodging expenses by sending a CV to presidente(a)rism.it For organizing purposes we kindly ask participants to get registered as soon as possible. Organizing Committee: Luigi Ambrosio, Elia Brué, Maria Colombo Best regards, Daniele Cassani -- Gianmario Tessitore Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca

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Seminario Veronica Berrocal presso Politecnico di Milano
by Laura Maria Sangalli 05 May '23

05 May '23

Si avvisa che in data 05-05-2023, alle ore 14:30 precise presso il Politecnico di Milano, Dipartimento di Matematica, Aula Saleri sesto piano (Edificio 14 - La Nave), nell’ambito delle attività del MOX con il patrocinio di GRASPA https://graspa.org si svolgerà il seguente seminario: Veronica Berrocal, University of California, Irvine Titolo: Bayesian non-stationary spatial modeling via domain partitioning, with application to soil organic carbon Abstract: Soil organic carbon (SOC) or the carbon found in soil’s organic matter is an important component in the Earth’s carbon cycle and can help mitigate the negative consequences of climate change. Because of its broad relevance to climate and agriculture, the Intergovernmental Panel on Climate Change recommended that the spatial distribution of SOC be carefully monitored. Due to time and cost constraints, spatially-referenced measurements of SOC or “stocks”, e.g. the amount of SOC in a volume, are available only at limited locations. In this talk I will present two Bayesian non-stationary statistical models for SOC with the goal of understanding spatial variability and dependence in SOC for sampling and spatial prediction of SOC. Both approaches model SOC by assuming that the process is globally non-stationary but locally stationary with regions of stationarity identified using different strategies. In one approach, the regions are defined as partitions of the spatial domain where spatially-varying covariates are more homogeneous; in the other, the regions are defined as subsets of the spatial domain with varying strength of spatial dependence. I will show that inference and SOC predictions yielded by our models are valuable for sampling design and to decision makers, in that they can be used to better benchmark mechanistic models and identify targets for soil restoration projects. 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=2273 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 https://sangalli.faculty.polimi.it <https://sangalli.faculty.polimi.it/>

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Seminar: N. Turchi at Sapienza [11 May]
by Anna Paola Todino 05 May '23

05 May '23

Dear colleagues, We would like to invite you to the following seminar, which will be held in person and online streaming: Speaker: Nicola Turchi (Università di Milano-Bicocca) Title: Comparing the min-max of two Gaussian random matrices (Abstract below) Date and Time: Thursday May 11, 14:00-15:00 (Rome time zone). Place: Aula 24, Dip. di Scienze Statistiche, Sapienza Università di Roma, Piazzale Aldo Moro, 5, 00185 Roma. link: https://uniroma1.zoom.us/j/94248808208?pwd=NWtwcFRtZFMrU0s1c2VPbjU0NWhPQT09 <https://uniroma1.zoom.us/j/94248808208?pwd=NWtwcFRtZFMrU0s1c2VPbjU0NWhPQT09> ID riunione: 942 4880 8208 Passcode: 337504 Best regards, Anna Paola Todino ————————— Abstract: We compute quantitative bounds for measuring the discrepancy between the distribution of two min-max statistics involving either pairs of Gaussian random matrices, or one Gaussian and one Gaussian-subordinated random matrix. In the fully Gaussian setup, our approach allows us to recover quantitative versions of well-known inequalities by Gordon, thus generalising the quantitative version of the Sudakov-Fernique inequality deduced by Chatterjee. On the other hand, the Gaussian-subordinated case yields generalizations of estimates obtained in the framework of the CCK theory. As applications, we establish comparison bounds for order statistics of random vectors and fourth moment bounds for matrices of multiple stochastic Wiener-Itô integrals. Based on a joint work with G. Peccati. ——————————————————— Anna Paola Todino Dipartimento di Scienze Statistiche Sapienza Università di Roma

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Open position at CNR IMATI in Milano
by Antonella Bodini 04 May '23

04 May '23

Please find below the information for an open position at CNR IMATI in Milano (www.imati.cnr.it): fixed term contract for an initial level researcher. The deadline applications is the end of May. Please circulate to all possible interested parties. --- Duration: 12 months, renewable up to further 12 months. PNRR Project: Robotics and Artificial Intelligence for Socio-Economic Empowerment (RAISE), subproject "Urban Technologies for Inclusive Engagement", Task 2.3 "Data-driven characterization of comfort of the built urban space" Research topic: Development of statistical learning methods with application to indoor and outdoor comfort models Requirements: At least three years experience in statistical modelling and inference, in particular in statistical/machine learning, and of programming in the R computing environment. Alternatively: possession of a Research Doctor or a PhD title relevant to the requested experience. Website: (in Italian) https://selezionionline.cnr.it/jconon/call-detail?callCode=400.11%20IMATI%2… (in English) https://selezionionline.cnr.it/jconon/call-detail?callCode=400.11%20IMATI%2… For more information please contact Dr Antonio Pievatolo at CNR IMATI Milano, antonio.pievatolo(a)mi.imati.cnr.it

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(PMS)^2 talk: J.-D. Deuschel [4 May] at UniMIB
by Maurizia Rossi 03 May '23

03 May '23

Dear colleagues, We are happy to announce the following *hybrid* - that is, in person with online streaming - talk: Speaker: *Jean-Dominique Deuschel* (TU Berlin) *Title: *An isomorphism theorem for Ginzburg-Landau interface models and scaling limits. (See Abstract below.) *Date and Time:* Thursday May 4, 16:30-17:30 (Rome time zone). Place: *Aula 3014, Dip. di Matematica e Applicazioni, Univ. di Milano-Bicocca*, Via R. Cozzi 55, Milano. *Webex link:* https://unimib.webex.com/unimib-it/j.php?MTID=mc07da73e64ea2eb0da78975bc808… *Meeting number:* 2741 491 0178*Password: *HPxNQASR579 (47967277 for phones) %%%%%%%%%% *Abstract: *We introduce a natural measure on bi-infinite random walk trajectories evolving in a time-dependent environment driven by the Langevin dynamics associated with a gradient Gibbs measure with convex potential. We derive an identity relating the occupation times of the Poissonian cloud induced by this measure to the square of the corresponding gradient field, which - generically - is not Gaussian. In the quadratic case, we recover a well-known generalization of the second Ray-Knight theorem. We further determine the scaling limits of the various objects involved in dimension 3, which are seen to exhibit homogenization. In particular, we prove that the renormalized square of the gradient field converges under appropriate rescaling to the Wick-ordered square of a Gaussian free field on R^3 with suitable diffusion matrix, thus extending a celebrated result of Naddaf and Spencer regarding the scaling limit of the field itself. (Based on joint work with Pierre-François Rodriguez.) %%%%%%%%%%% 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) -- Maurizia Rossi Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca https://mauriziarossi.wordpress.com

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Summer School on “Replicability crisis in science?”, University of Padova, Italy, 18-22 September 2023
by Susi Ceron 03 May '23

03 May '23

Dear All, it is a pleasure to announce the Summer School on “Replicability crisis in science?” University of Padova, Italy, 18-22 September 2023 The school is open to 30 Ph.D or Master students, no fees are required, but registration is mandatory. Lectures will be delivered in English. Main Lecturers: 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/) Course Outline: The main objective of the Summer School is to offer to a well-motivated small group of young people starting their scientific research journey an opportunity for high-level interdisciplinary training on crucial issues arising from the recent debate concerning the crisis of replicability in scientific research. The school will provide a broad and interdisciplinary view, as well as the tools that may enable individual participants to focus on specific aspects of replicability that are relevant to their own discipline of interest. Activities will include both main lectures and lab sessions for Master and Ph.D. students coming from different countries. The lectures will offer to participants a set of theoretical and applied tools to conduct and critically evaluate rigorous research. In workshop activities, students will have the opportunity to discuss the topics with both teachers and peers in order to overcome traditional boundaries between statistics and philosophy and other sciences as well as to stimulate innovative research hypotheses and international collaborations. Conference Website: http://replicability.stat.unipd.it/ Registration: application is now open until 31 May 2023. Participants will be selected based on their CV, motivation letter, research interests, and balance within the group in terms of gender and geographical origin. Notification of decisions will be sent to applicants via email by 30 June 2023. 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 http://replicability.stat.unipd.it/ or contact Bruno Scarpa (scarpa(a)stat.unipd.it)

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Summer School on “Replicability crisis in science?” Universty of Padova, Italy, 18-22 September 2023
by Alessandra Fabbri Colabich 03 May '23

03 May '23

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Fwd: GSSI Math Colloquium by Daniel Ueltschi / May 4th at 14.00
by Faggionato, Alessandra 03 May '23

03 May '23

Buongiorno, ricevo e con piacere inoltro. Saluti Alessandra ---------- Forwarded message --------- From: Serena Cenatiempo <serena.cenatiempo(a)gssi.it> Date: Wed, 3 May 2023 at 08:01 Subject: GSSI Math Colloquium by Daniel Ueltschi / May 4th at 14.00 To: Alessia Nota <alessia.nota(a)univaq.it> Dear all of the SMAQ group, this is to announce that Daniel Ueltschi will give a Colloquium talk at GSSI on *Loop models and the universal distribution of the loop lengths* this Thursday*, May 4th, 2023 at 14.00 in the **GSSI Auditorium (please NOTICE the unusual time).* The talk will be also streamed online at the link below: https://zoom.us/j/97365002731?pwd=cmR1Y0RIV3lxTlJ5QWVJUlN0akNvQT09 ID riunione: 973 6500 2731 Passcode: MATHatGSSI Abstract. I will review several models that consist of one-dimensional loops living in the three-dimensional space. These models describe bosonic systems, and classical or quantum spin systems. Their common feature is that the joint distribution of their loop lengths has universal behaviour: It is always a Poisson-Dirichlet distribution. Most of this theory is conjectural, but it is backed by numerical studies and some partial rigorous results. Best, Serena -------------------------------------------------- Serena Cenatiempo Gran Sasso Science Institute (GSSI) Viale Crispi n.7, 67100 - L'Aquila (Italy) phone: +39 0862 428 0276 email: serena.cenatiempo[at]gssi[dot]com homepage: http://www.serenacenatiempo.it/ -- ************************************************* Prof. Alessandra Faggionato https://www1.mat.uniroma1.it/people/faggionato/ Department of Mathematics University "La Sapienza" Piazzale Aldo Moro, 5 00185 - Rome Office 5, Phone (0039) 06 49913252 *************************************************

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