{"id":2872,"date":"2026-04-29T13:11:12","date_gmt":"2026-04-29T11:11:12","guid":{"rendered":"https:\/\/www.irimas.uha.fr\/?page_id=2872"},"modified":"2026-04-30T09:45:51","modified_gmt":"2026-04-30T07:45:51","slug":"seminaires-et-colloques","status":"publish","type":"page","link":"https:\/\/www.irimas.uha.fr\/en\/seminaires-et-colloques\/","title":{"rendered":"Seminars and Colloquium"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2872\" class=\"elementor elementor-2872\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d688ef9 e-flex e-con-boxed e-con e-parent\" data-id=\"d688ef9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dec045a elementor-widget elementor-widget-heading\" data-id=\"dec045a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">S\u00e9minaires et Colloques<\/h1>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5b4b2f5 e-grid e-con-boxed e-con e-parent\" data-id=\"5b4b2f5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ada68b elementor-widget elementor-widget-shortcode\" data-id=\"3ada68b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t<div id=\"irimas-seminaires-global-1\" class=\"irimas-seminaires-global\">\n\t\t\t<div class=\"irimas-seminaires-global-tabs\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"irimas-seminaires-global-tab \" data-target=\"informatique\">\n\t\t\t\t\t\tInformatique\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"irimas-seminaires-global-tab is-active\" data-target=\"mathematiques\">\n\t\t\t\t\t\tMath\u00e9matiques\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<button type=\"button\" class=\"irimas-seminaires-global-tab \" data-target=\"automatique-signal-et-image\">\n\t\t\t\t\t\tAutomatique, Signal et Image\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaires-global-panel \" data-panel=\"informatique\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3>OMeGA<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-2\"\n\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(From June 29, 2026 to July 2, 2026)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Summer School on Hybrid Metaheuristics with Learning Approaches<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">Universit\u00e9 de Haute-Alsace<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-2\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">We are pleased to announce the 2026 Summer School on Hybrid Metaheuristics with Learning Approaches, taking place June 29 \u2013 July 2, 2026 at the Universit\u00e9 de Haute-Alsace (France).<br>\n<br>\nThis 4-day intensive program will explore modern optimization methods at the intersection of Artificial Intelligence, Operations Research, and Data Science.<br>\nMany real-world optimization problems\u2014arising in logistics, energy systems, transportation, and healthcare\u2014are large-scale, nonlinear, and highly constrained. To address these challenges, researchers increasingly rely on hybrid approaches combining mathematical optimization, metaheuristics, and machine learning.<br>\n<br>\nWhat participants will learn ?<br>\n<br>\n\u2022 Mathematical modeling and exact optimization methods (MILP, Gurobi)<br>\n\u2022 Metaheuristics and approximate algorithms<br>\n\u2022 Machine learning for data-driven optimization<br>\n\u2022 Surrogate models for computationally expensive problems<br>\n\u2022 Hyper-heuristics for algorithm selection and generation<br>\nParticipants will work on a practical case study on Electric Vehicle Charging Scheduling (EVCS), illustrating how hybrid AI approaches can address emerging challenges in sustainable mobility and energy systems.<br>\n<br>\nFinal Challenge:<br>\nOn the last day, participants will take part in a hands-on optimization challenge based on the EVCS problem.<br>\nThree prizes will be awarded to the best performing solutions.<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-3\"\n\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(October 2026)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">EA 2026 \u2013 17th International Conference on Artificial Evolution<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">Nice, France<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-3\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">We are excited to announce the 17th International Conference on Artificial Evolution (EA 2026), which will take place in Nice, France, in October 2026.<br>\n<br>\nEA is a non-profit conference that brings together researchers working on:<br>\n- evolutionary computation<br>\n- optimization &amp; metaheuristics<br>\n- machine learning<br>\n- complex systems &amp; artificial intelligence<br>\n<br>\nThis edition will particularly highlight the exciting intersection between metaheuristics and machine learning, a rapidly growing research area.<br>\nWe strongly encourage in-person participation to foster scientific interaction, discussion, and collaboration.<br>\n<br>\nAccepted papers will be published in the conference proceedings, with a selection invited to the prestigious Springer LNCS series.<br>\n<br>\nMore information: https:\/\/ea2026.inria.fr\/<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaires-global-panel is-active\" data-panel=\"mathematiques\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<p class=\"irimas-seminaires-global-venue\">En Salle 201 B\u00e2timent K, FST, 18 rue des Fr\u00e8res Lumi\u00e8re, Mulhouse<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li style=\"list-style:none; margin:12px 0 8px -20px; color:#00368A; font-weight:700;\">Conf\u00e9rences pass\u00e9es :<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-4\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(June 11, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Herv\u00e9 Pajot - Universit\u00e9 Grenoble Alpes, Institut Fourier<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Quelle est la courbure d&#8217;un graphe ou d&#8217;un groupe ?<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-4\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">Il existe plusieurs notions de borne de courbure de Ricci pour les graphes et les groupes. Y. Ollivier a propos\u00e9 une approche via le transport optimal \u00e0 la Lott-Villani-Sturm. D. Bakry et M. Emery ont propos\u00e9 une autre approche via la th\u00e9orie des diffusions et la formule de Bochner en g\u00e9om\u00e9trie riemmanienne. Le but de l\u2019expos\u00e9 sera de montrer, via cette deuxi\u00e8me approche, comment donner des versions discr\u00e8tes de r\u00e9sultats classiques en analyse sur les vari\u00e9t\u00e9s (Bisoop-Gromov, Li-Yau, Harnack, Poincar\u00e9, \u2026).<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-5\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(June 9, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Nhat Thang Le<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">A forward approach to optimal stopping problems and optimal stopping games<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-5\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">Optimal stopping theory, developed through seminal works of Dynkin, Shiryaev, and others, is a fundamental topic in probability, stochastic control, and mathematical finance. Classical approaches typically rely on dynamic programming principles and the Snell envelope, which characterize the value function through backward recursive procedures. While these methods provide a powerful theoretical framework, alternative computational approaches have also been investigated.<br>\nIn this talk, I will first review some classical optimal stopping problems and discuss Irle\u2019s forward algorithm for finite-state Markov processes. In contrast to traditional backward methods, Irle\u2019s approach constructs the value function through a forward iterative procedure, leading to an efficient computational framework and new insights into the structure of optimal stopping problems.<br>\nMotivated by these ideas, I will then consider a two-player zero-sum stopping game driven by a homogeneous Markov process on a finite state space. Such games extend optimal stopping problems to a setting with competing players and strategic interactions. I will present a new algorithm for computing the value function of the game, which can be viewed as a game-theoretic extension of Irle\u2019s forward algorithm. The convergence of the method, the number of iterations required, and several numerical examples illustrating its performance will also be discussed.<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-6\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(May 7, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Lucas Arakaki (UNICAMP Campinas Br\u00e9sil)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Strict Increase in the number of normally hyperbolic invariant tori in 3D polynomial vector fields<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-6\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><p style=\"margin: 0px 0px 25px;color: #7a7a7a;, sans-serif\">The problem of estimating the maximal number H(m) of limit cycles that planar polynomial vector fields of degree m can exhibit has long been a central question in the qualitative theory of planar dynamical systems. A natural extension to the threedimensional space is to study the maximum number N(m) of limit tori that can occur in spatial polynomial vector fields of degree m. In this work, we focus on normally hyperbolic limit tori and show that the corresponding maximum number N_h(m), if finite, increases strictly with m. More precisely, we prove that N_h(m+1) \u2a7e N_h(m)+ 1. Our proof relies on two central results established in this paper. The first is that the normal<br \/>hyperbolicity of compact invariant manifolds is preserved under time reparametrizations.<\/p>\n<p style=\"margin: 0px 0px 25px;color: #7a7a7a;, sans-serif\">Despite the fundamental nature of this statement, a complete proof has, surprisingly, not previously appeared in the literature, except under rather restrictive assumptions on the flow restricted to the invariant manifold. The second result concerns the torus bifurcation phenomenon near Hopf\u2013Zero equilibria in spatial vector fields. While the conditions for such bifurcations are typically expressed in terms of higher-order normal form coefficients, we derive explicit and verifiable criteria for the occurrence of torus bifurcation, assuming only that the linear part of the unperturbed vector field is in Jordan normal form.<\/p>\n<p style=\"margin: 0px 0px 25px;color: #7a7a7a;, sans-serif\">This approach not only circumvents intricate computations involving higher-order normal forms but also ensures the normal hyperbolicity of the bifurcated torus.<\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-7\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 30, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Harprit Singh - SISSA (Tieste, Italie)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">SPDEs in inhomogeneous Environments<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-7\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">The area of stochastic partial differential equations has seen rapid progress over the past decade, spurred by the introduction of the theory of regularity structures and of para-controlled calculus. Despite the close connections of singular SPDEs to physical phenomena, the theory of singular SPDEs has largely been developed homogeneous settings, involving constant-coefficient operators.First I shall motivate the study of SPDEs in heterogeneous environments using the examples of \u03a6^4 as a model of ferromagnetism and the parabolic Anderson model as it relates to branching processes.After recalling the renormalisation of the classical homogeneous versions of these equations, I will describe what changes in the variable-coefficient setting. In particular, I will present a natural choice of renormalisation functions that is local and, for sufficiently covariant regularisations of the noise, explicit.The talk will be non-technical and focused on the main ideas.<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-8\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 16, 2026 - 15:30)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Polyxeni Spilioti (Univ. of Patras, Gr\u00e8ce)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Determinants of twisted Laplacians and the twisted Selberg zeta function.<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-8\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><p><span style=\"color: #7a7a7a;, sans-serif\">In this talk, we consider a compact hyperbolic surface with finite order singularities and its unit tangent bundle.<\/span><br style=\"color: #7a7a7a;, sans-serif\" \/><span style=\"color: #7a7a7a;, sans-serif\">We consider also the twisted Selberg zeta function associated with an arbitrary, finite-dimensional representation of the fundamental group of the unit tangent bundle.<\/span><br style=\"color: #7a7a7a;, sans-serif\" \/><span style=\"color: #7a7a7a;, sans-serif\">We will present recent results concerning a relation between the twisted Selberg zeta function and the regularized determinant of the twisted Laplacian. The main tool we use is the Selberg trace formula. If the surface has no finite order singularities, we obtain as a corollary a corresponding relation. These results can be viewed as an extension to the non-unitary twists case of the results by Sarnak and Naud. This is joint work with Jay Jorgenson and Lejla Smajlovic.<\/span><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-9\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 16, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Maria Martin Vega (Univ. de Paris-Cit\u00e9)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">The Bruno Ideal for logarithmic vector fields<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-9\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><p><span style=\"color: #7a7a7a;, sans-serif\">Given a germ of analytic vector field \u2202, let \u2202= \u2202_ss + \u2202_nilp be its unique formal Jordan decomposition, where \u2202_ss is its semi-simple component and \u2202_nilp is its nilpotent component. When \u2202 is logarithmic, we define the Bruno ideal B(\u2202) as the formal locus where the semi-simple and the nilpotent components are collinear, that is, the vanishing locus of \u2202_ss \u2227 \u2202_nilp.<\/span><br style=\"color: #7a7a7a;, sans-serif\" \/><span style=\"color: #7a7a7a;, sans-serif\">We prove the following result originally stated by A. D. Bruno: If the eigenvalues of \u2202_ss satisfy an arithmetic condition, then B(\u2202) is analytic and the restriction of \u2202 to its zero set V is analytically normalizable.<\/span><br style=\"color: #7a7a7a;, sans-serif\" \/><span style=\"color: #7a7a7a;, sans-serif\">This is a joint work with Daniel Panazzolo.<\/span><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-10\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 9, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Dorian Perrot - Universit\u00e9 de Lorraine<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">L&#8217;algorithme de Bowyer-Watson, du plan euclidien aux surfaces hyperboliques<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-10\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><p><span style=\"color: #7a7a7a;, sans-serif\">Une triangulation d\u2019un ensemble de points dans le plan euclidien est dite de Delaunay si chaque cercle circonscrit \u00e0 un triangle ne contient aucun autre sommet de la triangulation. Son extension \u00e0 des surfaces, ainsi que certains algorithmes permettant de la calculer, se heurte \u00e0 des difficult\u00e9s topologiques (genre de la surface) et g\u00e9om\u00e9triques (systole de la surface).<\/span><br style=\"color: #7a7a7a;, sans-serif\" \/><span style=\"color: #7a7a7a;, sans-serif\">Cet expos\u00e9 introduira la notion de triangulation de Delaunay, et pr\u00e9sentera des m\u00e9thodes de calcul permettant de la calculer comme l\u2019algorithme de flip ou de Bowyer-Watson. Nous nous focaliserons ensuite sur ce-dernier, en l\u2019\u00e9tendant d\u2019abord au tore, puis aux surfaces hyperboliques, en passant par la surface de Bolza. Aucun pr\u00e9requis en g\u00e9om\u00e9trie hyperbolique, topologie ou algorithmique n\u2019est n\u00e9cessaire pour suivre l\u2019expos\u00e9.<\/span><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-11\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(March 26, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Stefan Waldmann - Universit\u00e4t W\u00fcrzburg<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Convergent Twist Deformations<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-11\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\">In this talk I will report on a recent joint work with Chiara Esposito and Michael Heins on convergence properties of Drinfel\u2019d twists. A formal Drinfel\u2019d twist is a formal power series in \\(hbar\\) with entries in the tensor power of the universal enveloping algebra of a Lie algebra with itself such that certain algebraic conditions are satisfied. These algebraic properties can either be interpreted as defining an associative formal product on the corresponding Lie group by left translations. Alternatively, they can be used to define formal associative deformations of any algebra on which the Lie algebra acts by derivations by a universal deformation formula (UDF). We study now the situation of locally convex algebras and consider the space of $R$-analytic and \\(R\\)-entire vectors with respect to the representation. These spaces are generalizations of the usual analytic and entire vector depending now on a parameter $R$ which controls the growth of their Taylor coefficients. Once the twist satisfies a certain continuity condition we show that one obtains convergence of the UDF thus leading to a non-formal deformation. Several examples illustrate that this is a promising and rich scenario to obtain convergence deformations.<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-12\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(March 19, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Paul Laubie - Universit\u00e9 de Lorraine<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">B-s\u00e9ries : interactions entre th\u00e9orie des cat\u00e9gories et analyse num\u00e9rique<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-12\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><div style=\"color: #7a7a7a;, sans-serif\" data-attr=\"forced_root_block_attrs\">Apr\u00e8s un bref rappel historique sur les B-s\u00e9ries, nous introduirons le cadre cat\u00e9gorique naturel \u00e0 leur \u00e9tude.<\/div>\n<div style=\"color: #7a7a7a;, sans-serif\" data-attr=\"forced_root_block_attrs\">Nous verrons ensuite que certaines techniques classiques d\u2019alg\u00e8bre sup\u00e9rieure fournissent des r\u00e9sultats d\u2019analyse num\u00e9rique via ce contexte cat\u00e9gorique.<\/div>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-13\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(March 19, 2026 - 15:30)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Douglas Duarte Novaes - IMECC UNICAMP, Campinas, Br\u00e9sil<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">A Mechanism for Detecting Invariant Tori with Applications to a Higher-Dimensional Version of Hilbert\u2019s 16th Problem<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-13\" class=\"irimas-seminaire-item-panel\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-text\" style=\"color:#000;\"><div class=\"irimas-actualite-texte irimas-latex-content\"><p><span style=\"color: #7a7a7a;, sans-serif\">Invariant compact manifolds, such as equilibria, periodic orbits, and invariant tori, provide important information about the dynamics of differential systems. This knowledge is significantly increased when we can describe the behavior of nearby trajectories. In this talk, we present conditions that ensure the existence of invariant tori in perturbed differential systems, along with results on their regularity, stability, and dynamics. These conditions are based on higher-order averaged equations and extend classical theorems by Krylov, Bogoliubov, Mitropolsky, and Hale. As an application, we also explore a three-dimensional version of Hilbert\u2019s 16th Problem, focusing on the number of isolated invariant tori in 3D polynomial vector fields.<\/span><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaires-global-panel \" data-panel=\"automatique-signal-et-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h3>IMTIS<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li style=\"list-style:none; margin:12px 0 8px -20px; color:#00368A; font-weight:700;\">Conf\u00e9rences pass\u00e9es :<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--static\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-static\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(June 11, 2026 - 18:30 to 20:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">St\u00e9phane Bazeille<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Comment les robots per\u00e7oivent-ils le monde ?<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">UP du Rhin, salle de conf\u00e9rences de la Cour des cha\u00eenes, 13 rue des Franciscains 68100 \u2013 Mulhouse<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--static\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-static\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(June 4, 2026 - 15:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Salem Ait Messaoud<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Simulation et \u00e9dition de d\u00e9fauts par 3d Gaussian Splatting<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">Mulhouse University of Technology, Room A004<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--static\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-static\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(May 21, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Titouan S\u00e9randour<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Un mod\u00e8le d\u2019apprentissage profond pour la d\u00e9tection des n\u00e9buleuses plan\u00e9taires sur des images astronomiques<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">Mulhouse University of Technology, Room A004<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--accordion\">\n\t\t\t\t\t\t\t\t\t\t\t<button\n\t\t\t\t\t\t\t\t\t\t\t\ttype=\"button\"\n\t\t\t\t\t\t\t\t\t\t\t\tclass=\"irimas-seminaire-item-trigger\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-expanded=\"false\"\n\t\t\t\t\t\t\t\t\t\t\t\taria-controls=\"irimas-sem-reg-17\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 30, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Hadi Mawassi<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Fast hybrid FNN-GPR modeling for state of health estimation in Lithium-ion cells using early charge data: addressing performance variability<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">Mulhouse University of Technology, Room A004<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<div id=\"irimas-sem-reg-17\" class=\"irimas-seminaire-item-panel irimas-seminaire-item-panel--images-only\" role=\"region\" hidden>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-images irimas-seminaire-item-images--compact\"><figure class=\"irimas-seminaire-item-figure\"><img src=\"https:\/\/www.irimas.uha.fr\/wp-content\/uploads\/2026\/05\/IMG_3407-1024x768.jpg\" alt=\"Fast hybrid FNN-GPR modeling for state of health estimation in Lithium-ion cells using early charge data: addressing performance variability\" loading=\"lazy\" decoding=\"async\" \/><\/figure><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--static\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-static\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(April 2, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Julie Munsch<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Mod\u00e8les graphiques et probabilistes pour la maintenance pr\u00e9dictive application \u00e0 la classification et \u00e0 la pr\u00e9vention d\u2019\u00e9v\u00e8nements<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-lieu-inline\">IUT Mulhouse, Salle A004<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"irimas-seminaire-list-item irimas-seminaire-list-item--static\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"irimas-seminaire-item-static\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-headline\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-actualite-event-date\">(March 19, 2026 - 14:00)<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-person\">Carlos Alberto Chacon<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \u2014 \t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"irimas-seminaire-item-title\">Microscopie tomographique diffractive \u00e0 double 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