Event List
retrieve:
Return the details about the given Event id.
list:
List all Event objects.
GET /api/v1/events/?format=api&offset=120&ordering=-event__category
{ "count": 238, "next": "https://memento.epfl.ch/api/v1/events/?format=api&limit=10&offset=130&ordering=-event__category", "previous": "https://memento.epfl.ch/api/v1/events/?format=api&limit=10&offset=110&ordering=-event__category", "results": [ { "id": 71499, "title": "IMX Talks - Value-added utilization of biomass and CO2 for sustainable aviation fuels and biomaterials", "slug": "imx-talks-value-added-utilization-of-biomass-and-2", "event_url": "https://memento.epfl.ch/event/imx-talks-value-added-utilization-of-biomass-and-2", "visual_url": "https://memento.epfl.ch/image/32841/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32841/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32841/max-size.jpg", "lang": "en", "start_date": "2026-04-16", "end_date": "2026-04-16", "start_time": "15:30:00", "end_time": "16:15:00", "description": "<p>The conversion of low-carbon resources such as biomass and CO<sub>2</sub> into synthetic liquid fuels, value-added chemicals, and biomaterials is a crucial approach for global carbon emission reduction. In this context, this talk will focus on recent research advances on biomass and CO<sub>2</sub> conversion to sustainable aviation fuels (SAF), chemicals and bio-based materials. Considering the challenges associated with low-carbon resources, including dispersed distribution, significant fluctuations in raw material composition, and high conversion costs, a distributed-centralized system utilizing alcohols as key platform molecules has been proposed. Alcohol synthesis from biomass and CO<sub>2</sub> will be presented with the focus on catalysis for methanol (thermocatalysis) and ethanol synthesis (electrocatalysis) from CO<sub>2</sub>. Conversion of alcohol to SAF will be introduced with discussions on the design of multifunctional catalysts for alcohol conversion, the dynamic evolution of catalytic sites, and the strategies for tuning product distributions. Additionally, a few examples of biobased materials, such as cellulose nanofiber-based biomaterials and bio-based nylon precursor and polyester precursor, will be presented.<br>\r\n<br>\r\nBio: Dr. Zhenglong Li is the “Qiushi” Chair Professor of Zhejiang University. He is the lead of the sustainable aviation fuels research of the State Key Laboratory of Bio-based Transportation Fuel Technology, director of the Biomass Value-Added Utilization Research Center, and the director of the Bio-based Chemicals Division in the Institute of Zhejiang University-Quzhou. His research is dedicated to the high-value utilization of biomass and carbon dioxide to synthesize sustainable aviation fuel, chemicals, and bio-based materials. He was the team lead in the biomass conversion area at the Oak Ridge National Laboratory (United States) prior to joining Zhejiang University. He was the committee member for the Chemical Catalysis for Bioenergy Consortium under the United States Department of Energy (DOE). His group focus on in-depth understanding of the catalytic processes of biomass and carbon dioxide at the molecular level to guide catalyst design, process development, and industrial application, especially R&D of SAF, bio-based chemicals, key bio-based polymer building blocks. His research group has published many high-impact scientific papers in top journals such as <em>J. Am. Chem. Soc., Nat. Commun., Proc. Natl. Acad. Sci. U.S.A., ACS Catal., Appl. Catal. B.,</em> and others. In terms of technology commercialization, he has developed new core technologies such as bio-based alcohols conversion for sustainable aviation fuel and bio-based biodegradable materials.<br>\r\n </p>", "image_description": "", "creation_date": "2026-03-31T08:53:46", "last_modification_date": "2026-03-31T08:53:57", "link_label": "Website", "link_url": "https://person.zju.edu.cn/en/0021139", "canceled": "False", "cancel_reason": "", "place_and_room": "MXF 312", "url_place_and_room": "https://plan.epfl.ch/?room==MXF%20312", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Prof. Zhenglong Li, Zhejiang University, China", "organizer": "Prof. Tiffany Abitbol", "contact": "Prof. Tiffany Abitbol", "is_internal": "False", "theme": "", "vulgarization": { "id": 1, "fr_label": "Tout public", "en_label": "General public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120243/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/8/?format=api", "https://memento.epfl.ch/api/v1/mementos/314/?format=api" ] }, { "id": 71498, "title": "From Helical Motifs to Oral Drugs: Design Principles for Bioavailable Macrocyclic Peptides", "slug": "from-helical-motifs-to-oral-drugs-design-principle", "event_url": "https://memento.epfl.ch/event/from-helical-motifs-to-oral-drugs-design-principle", "visual_url": "https://memento.epfl.ch/image/32840/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32840/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32840/max-size.jpg", "lang": "en", "start_date": "2026-04-20", "end_date": "2026-04-20", "start_time": "14:15:00", "end_time": "15:15:00", "description": "<p>In this seminar, I will discuss our efforts to design conformationally constrained helical macrocyclic peptides and outline the principles that enable effective targeting of protein–protein interactions beyond classical stapled peptides. In the second part, I will show how a subtle isosteric backbone modification—thioamidation—can be used to impart oral bioavailability to bioactive macrocyclic peptides. I will further illustrate how conformational restriction enhances membrane permeability and highlight the critical role of metabolic stability in achieving oral bioavailability.</p>", "image_description": "Prof. Jayanta Chatterjee", "creation_date": "2026-03-30T19:14:23", "last_modification_date": "2026-03-30T19:24:00", "link_label": "Publications Prof. Jayanta Chatterjee", "link_url": "https://scholar.google.com/citations?user=r0aQPNIAAAAJ&hl=en", "canceled": "False", "cancel_reason": "", "place_and_room": "BCH 3118", "url_place_and_room": "https://plan.epfl.ch/?room==BCH%203118", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Prof. Jayanta Chatterjee, Indian Institute of Science, Bangalore, India", "organizer": "C. Heinis", "contact": "C. Heinis", "is_internal": "False", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "cbseminar", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120241/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/5/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/14/?format=api" ] }, { "id": 71489, "title": "Adapting to Conflict: Equilibrium structure and adaptive learning in harmonic games", "slug": "adapting-to-conflict-equilibrium-structure-and-ada", "event_url": "https://memento.epfl.ch/event/adapting-to-conflict-equilibrium-structure-and-ada", "visual_url": "https://memento.epfl.ch/image/32834/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32834/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32834/max-size.jpg", "lang": "en", "start_date": "2026-04-09", "end_date": "2026-04-09", "start_time": "11:15:00", "end_time": "12:00:00", "description": "<strong>Abstract</strong><br>\r\nWe propose an adaptive, “parameter-agnostic” algorithm for learning in harmonic games, a class of finite games characterized by strictly opposed, conflicting interests. In contrast to zero-sum games—which do not always capture conflict, even between two players—harmonic games may exhibit highly non-convex equilibrium configurations. In particular, if the game’s ambient dimension is odd, we show that the set of totally mixed Nash equilibria is a (typically non-convex) real algebraic variety of dimension at least one, which extends all the way to the boundary of the game’s strategy space. Despite the difficulties incurred by this complicated equilibrium structure, we provide an extrapolation-based variant of “follow-the-regularized-leader” (FTRL) which converges to Nash equilibrium with order-optimal regret guarantees: O(1) in self-play, and O( sqrt(T) ) against arbitrary play.<br>\r\n<br>\r\n<br>\r\n<strong>Biography</strong><br>\r\nDavide Legacci is a PhD candidate in Computer Science at Université Grenoble Alpes, CNRS and Inria, within the GHOST team, supervised by Panayotis Mertikopoulos and Bary S. R. Pradelski. His research lies at the intersection of game theory and online learning, with a focus on the geometric structure of competitive interactions and the design of no-regret learning dynamics for adversarial environments. His work has been presented at leading machine learning venues including ICML and NeurIPS. He is expected to defend his PhD in September 2026.<br>\r\n ", "image_description": "", "creation_date": "2026-03-30T14:40:05", "last_modification_date": "2026-03-31T17:07:35", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "ME B0 374", "url_place_and_room": "https://plan.epfl.ch/?room==ME%20B0%20374", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Davide Legacci, PhD candidate in Computer Science at <a href=\"https://www.inria.fr/fr/centre-inria-universite-grenoble-alpes\">Université Grenoble Alpes, CNRS and Inria,</a>", "organizer": "Prof. Maryam Kamgarpour", "contact": "[email protected]", "is_internal": "False", "theme": "", "vulgarization": { "id": 1, "fr_label": "Tout public", "en_label": "General public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120228/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/8/?format=api", "https://memento.epfl.ch/api/v1/mementos/15/?format=api", "https://memento.epfl.ch/api/v1/mementos/394/?format=api" ] }, { "id": 71486, "title": "Topological Data Analysis for Gait Pattern Classification", "slug": "topological-data-analysis-for-gait-pattern-classif", "event_url": "https://memento.epfl.ch/event/topological-data-analysis-for-gait-pattern-classif", "visual_url": "https://memento.epfl.ch/image/32831/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32831/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32831/max-size.jpg", "lang": "en", "start_date": "2026-04-23", "end_date": "2026-04-23", "start_time": "10:00:00", "end_time": "11:00:00", "description": "<p>The classification of gait patterns is an important challenge in movement analysis, as it supports clinical assessment and decision-making by enabling diagnosis and severity stratification. In this talk, I will discuss the potential of Topological Data Analysis (TDA) for gait pattern classification. Unlike conventional approaches that rely on explicit detection of Gait Events (GEs) to compute Spatiotemporal Gait Parameters (SGPs), TDA characterises the global structure of gait signals directly, capturing relationships and patterns in the data without requiring GEs. This is particularly relevant in real-world settings, where GE detection can be diQicult due to heterogeneity in walking conditions and gait patterns, potentially biasing clinically relevant metrics and, consequently, decision-making.<br>\r\nWithin our department, preliminary results have shown that TDA-based features can achieve classification performance comparable to that of SGPs in fall-risk assessment. These findings suggest that topology oQers a competitive alternative for representing gait data, with the potential to better handle variability across subjects and pathological<br>\r\nconditions.<br>\r\nBuilding on these results, we plan to further extend the TDA framework in two directions. First, we aim to investigate time-aware topological methods to better capture the<br>\r\ntemporal structure of gait signals. Second, we will explore Topological Deep Learning (TDL) approaches to reduce reliance on handcrafted design choices and potentially<br>\r\nimprove classification performance. By combining the robustness of topology with datadriven representation learning, this work seeks to provide robust tools for the classification of typical and pathological gait patterns.<br>\r\n </p>", "image_description": "", "creation_date": "2026-03-30T09:44:37", "last_modification_date": "2026-03-30T09:47:45", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "CM 1 517", "url_place_and_room": "https://plan.epfl.ch/?room==CM%201%20517", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Elena Botti, Vrije Universiteit Brussel (VUB)", "organizer": "Markus Kirolos", "contact": "Maroussia Schaffner", "is_internal": "False", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120224/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/5/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/7/?format=api" ] }, { "id": 71457, "title": "lunch&LEARN: Bridging the gap between the math taught in first-year courses and the math used in life sciences research", "slug": "lunchlearn-bridging-the-gap-between-the-math-taugh", "event_url": "https://memento.epfl.ch/event/lunchlearn-bridging-the-gap-between-the-math-taugh", "visual_url": "https://memento.epfl.ch/image/32806/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32806/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32806/max-size.jpg", "lang": "en", "start_date": "2026-04-21", "end_date": "2026-04-21", "start_time": "12:15:00", "end_time": "13:00:00", "description": "<p>For more than two decades leading professional organizations have called for a reform of the mathematics education of biology and life sciences students. Reflecting the growing importance of mathematics in life sciences research, such reform should bridge the gap between the mathematics students learn and the mathematics used in research.<br>\r\n<br>\r\nIn this talk, <a href=\"https://teaching.ucla.edu/profile/steve-bennoun/\">Steve Bennoun</a>, UCLA, will present how the study of modeling and dynamical systems can be used to create a first-year course that introduces mathematical concepts used in life sciences research in a contextualized way.<br>\r\n<br>\r\nStudents first learn to write models for important biological systems such as hormone levels, epidemiological models, and predator-prey models.<br>\r\n<br>\r\nTaking a geometrical approach, students learn how to determine the long-term behaviors of models by studying phase plane trajectories and the stability of equilibrium points.<br>\r\n<br>\r\nThis enables the study of the concept of “biological switch” or how a cell can start or stop the production of a protein. This is followed by the important notion of qualitative change in a biological systems, or bifurcation.<br>\r\n<br>\r\nStudents learn in particular about Hopf bifurcations or how a system can start or stop oscillating. The second part of the course moves somewhat away from the geometrical approach and focuses on how to determine the stability of equilibrium points using the linearization of a model, motivating the study of the necessary notions from linear algebra by studying discrete-time models.<br>\r\n<br>\r\nThis talk will end with a discussion focusing on research by Sanders et al. (2021) suggesting that such a course supports students success and can reduce equity gaps.<br>\r\n<br>\r\n- - - - - - - - - - - - - <br>\r\n<br>\r\n<em><strong>lunch&LEARN</strong></em> sessions are intended for anyone who teaches at EPFL. <br>\r\nThis session is hybrid and can be attended in person or <a href=\"https://epfl.zoom.us/meeting/register/itgbPQceSnyGQK_-KbEttA\">followed via zoom</a>.<br>\r\nMost sessions are recorded and can be found on the <a href=\"https://www.youtube.com/playlist?list=PLKZOhx3xKAdI81PA1jwBA_LHHfSjbdEUV\">Center LEARN's YouTube channel</a>.<br>\r\nTo get in touch with the team, to suggest a session, or to make inquiries, please send an email to <a href=\"mailto:[email protected]\">[email protected]</a></p>", "image_description": "lunch&LEARN flyer for Steven Bennoun's talk", "creation_date": "2026-03-26T09:31:18", "last_modification_date": "2026-03-31T10:04:59", "link_label": "Register/Access zoom", "link_url": "https://epfl.zoom.us/meeting/register/M8aJRgrLR6SAGywAeyUtfA", "canceled": "False", "cancel_reason": "", "place_and_room": "CM 1 517", "url_place_and_room": "https://plan.epfl.ch/?room==CM%201%20517", "url_online_room": "https://epfl.zoom.us/meeting/register/M8aJRgrLR6SAGywAeyUtfA", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "<a href=\"https://teaching.ucla.edu/profile/steve-bennoun/\">Steve Bennoun</a>", "organizer": "<a href=\"https://learn.epfl.ch\">Center LEARN</a>, <a href=\"https://www.epfl.ch/schools/sb/research/math/\">Institute of Mathematics – MATH</a>", "contact": "<a href=\"mailto:[email protected]\">[email protected]</a>", "is_internal": "True", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 1, "fr_label": "Sur inscription", "en_label": "Registration required" }, "keywords": "lunch&LEARN, Center LEARN, teaching, learning, first-year, mathematics", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120189/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/1/?format=api", "https://memento.epfl.ch/api/v1/mementos/323/?format=api", "https://memento.epfl.ch/api/v1/mementos/6/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/85/?format=api", "https://memento.epfl.ch/api/v1/mementos/65/?format=api", "https://memento.epfl.ch/api/v1/mementos/27/?format=api", "https://memento.epfl.ch/api/v1/mementos/7/?format=api" ] }, { "id": 71450, "title": "Visitors Talk: Mary Helen Immordino-Yang, University of Southern California", "slug": "visitors-talk-mary-helen-immordino-yang-university", "event_url": "https://memento.epfl.ch/event/visitors-talk-mary-helen-immordino-yang-university", "visual_url": "https://memento.epfl.ch/image/32798/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32798/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32798/max-size.jpg", "lang": "en", "start_date": "2026-04-24", "end_date": "2026-04-24", "start_time": "13:00:00", "end_time": "14:00:00", "description": "<p>Hosted by Solange Denervaud, CIBM Flagship Project Officer, we are pleased to invite you to attend the CIBM Visitors Talk on April 24th at 13:00 CEST by Mary Helen Immordino-Yang from the University of Southern California who will be sharing on “Longitudinal neurodevelopmental correlates of mid-adolescents’ psychosocial processing: A path to young adult wellbeing?”.<br>\r\n<br>\r\n<strong>Abstract</strong><br>\r\nCombining open-ended interviews (outside the scanner) with structural, trial-by-trial, and resting-state functional MRI neuroimaging, we examined real-time functional neural dynamics underlying diverse urban mid-adolescents’ cognitive and emotional engagement with compelling social stories at two time-points, two years apart. We found that the patterns of longitudinal change in neural network dynamics predicted psychosocial outcomes five years later in young adulthood.<br>\r\nWe found that “transcendent thinking” – seeing situations not just in terms of X happened to person A, which makes me feel thusly, but in terms of the larger societal and contextual forces that shaped how Person A was treated and how Person A reacted, the broader implications and lessons one can draw from that situation, and the larger issues it exemplifies or reveals—correlated with a particular set of neural activity dynamics and predicted future structural and functional neural development across the subsequent two years, controlling for the starting state of neural development, and independent of IQ and SES. Transcendent thinking also countered negative effects of exposure to community violence on structural brain development.<br>\r\nThe neural development predicted by transcendent thinking (the changes in the brain across the 2-year period) in turn predicted young adult identity strength, self-liking, relationship satisfaction, and achievement 5 years later.<br>\r\nThese findings reveal a novel predictor of neural development across mid-adolescence, and underscore the active role adolescents play in their own brain development through the meaning they make of the social world. Implications for secondary education and pedagogy will be discussed.<br>\r\n<br>\r\n </p>", "image_description": "Visitors Talk: Mary Helen Immordino-Yang, University of Southern California", "creation_date": "2026-03-25T12:31:22", "last_modification_date": "2026-03-25T12:31:38", "link_label": "Website of the event", "link_url": "https://cibm.ch/event/visitors-talk-mary-helen-immordino-yang-university-of-southern-california/", "canceled": "False", "cancel_reason": "", "place_and_room": "CH F1 614", "url_place_and_room": "https://plan.epfl.ch/?room==CH%20F1%20614", "url_online_room": "https://epfl.zoom.us/meeting/register/J9fJmYSQStOHtZMlxhTgaw", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "<strong>Mary Helen Immordino-Yang,</strong> University of Southern California", "organizer": "<a href=\"https://cibm.ch\">CIBM Center for Biomedical Imaging</a>", "contact": "Miguel Molina, CIBM Media & Events Manager", "is_internal": "False", "theme": "", "vulgarization": { "id": 1, "fr_label": "Tout public", "en_label": "General public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "neuroscience, psycology, education", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120181/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/8/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/284/?format=api", "https://memento.epfl.ch/api/v1/mementos/5/?format=api" ] }, { "id": 71449, "title": "N-fold groupoids and n-groupoids in semi-abelian categories", "slug": "n-fold-groupoids-and-n-groupoids-in-semi-abelian-c", "event_url": "https://memento.epfl.ch/event/n-fold-groupoids-and-n-groupoids-in-semi-abelian-c", "visual_url": "https://memento.epfl.ch/image/32797/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32797/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32797/max-size.jpg", "lang": "en", "start_date": "2026-04-16", "end_date": "2026-04-16", "start_time": "10:00:00", "end_time": "11:00:00", "description": "<p>The notion of semi-abelian category, introduced by G. Janelidze, L. Márki and W. Tholen in 2002, generalizes that of abelian category, and captures the homological properties that the categories of groups, associative algebras, Lie algebras and cocommutative Hopf algebras over a field have in common. Internal structures behave surprisingly well in semi-abelian categories. For example, any internal reflexive graph admits at most one internal category structure, and the categories of internal categories and internal groupoids are isomorphic. Moreover, the category of internal groupoids is equivalent to the category of internal crossed modules. The notion of internal crossed module in any semi-abelian category was introduced by G. Janelidze in 2003, and recovers in particular the classical notion of crossed module of groups. The fact that the category of internal groupoids in a semi-abelian category is itself semi-abelian implies that also the category of internal n-fold groupoids is well-behaved.<br>\r\n <br>\r\nIn this talk, I will prove that the full subcategory of internal n-groupoids in a semi-abelian category is a Birkhoff subcategory of the category of internal n-fold groupoids, and provide a simple description of the corresponding reflection for n=2. In the abelian context, the internal n-groupoids yield a torsion-free subcategory of the category of internal n-fold groupoids, and it is possible to characterize (higher) central extensions and compute generalized Hopf formulae for homology. <br>\r\n <br>\r\nPart of this talk is based on joint work with Marino Gran<br>\r\n </p>", "image_description": "", "creation_date": "2026-03-25T12:18:18", "last_modification_date": "2026-03-25T12:25:27", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "MA B1 504", "url_place_and_room": "https://plan.epfl.ch/?room==MA%20B1%20504", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Nadja Egner, UC Louvain", "organizer": "Markus Kirolos", "contact": "Maroussia Schaffner", "is_internal": "False", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120179/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/1/?format=api", "https://memento.epfl.ch/api/v1/mementos/5/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/7/?format=api", "https://memento.epfl.ch/api/v1/mementos/6/?format=api" ] }, { "id": 71448, "title": "Topological properties of rough fluids and plasmas", "slug": "topological-properties-of-rough-fluids-and-plasmas", "event_url": "https://memento.epfl.ch/event/topological-properties-of-rough-fluids-and-plasmas", "visual_url": "https://memento.epfl.ch/image/32796/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32796/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32796/max-size.jpg", "lang": "en", "start_date": "2026-04-24", "end_date": "2026-04-24", "start_time": "14:15:00", "end_time": null, "description": "<p>Abstract:<br>\r\nAs anticipated by Onsager's conjecture, low-regularity solutions of the Euler equations exhibit greater flexibility than classical solutions. In the first part of this talk we focus on steady solutions, showing that in the low-regularity regime their streamlines can realize any prescribed topology, a phenomenon that cannot occur for classical solutions. The key tool is a novel implementation of convex integration that preserves the topology of the streamlines throughout the iteration. In the second part we extend these ideas to the MHD equations, constructing continuous weak solutions with constant nonzero helicity that nevertheless fail to conserve energy and cross helicity.</p>", "image_description": "", "creation_date": "2026-03-25T09:22:27", "last_modification_date": "2026-03-25T09:22:27", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "MA B1 11", "url_place_and_room": "https://plan.epfl.ch/?room==MA%20B1%2011", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Dr. Javier Peñafiel-Tomás (ICMAT)", "organizer": "Prof. Maria Colombo", "contact": "Prof. Maria Colombo", "is_internal": "False", "theme": "", "vulgarization": { "id": 1, "fr_label": "Tout public", "en_label": "General public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120178/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/7/?format=api", "https://memento.epfl.ch/api/v1/mementos/259/?format=api" ] }, { "id": 71446, "title": "Contributing to community-driven open-source in the age of agentic AI: my scikit-learn experience", "slug": "contributing-to-community-driven-open-source-in-th", "event_url": "https://memento.epfl.ch/event/contributing-to-community-driven-open-source-in-th", "visual_url": "https://memento.epfl.ch/image/32794/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32794/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32794/max-size.jpg", "lang": "en", "start_date": "2026-04-16", "end_date": "2026-04-16", "start_time": "14:00:00", "end_time": "15:00:00", "description": "<strong>The Keynote of the 3rd Lemanic Life Sciences Hackathon is open to the EPFL Community.</strong><br>\r\n<br>\r\nIn this talk, Guillaume will go back in time 10 years ago to my personal contributions to the scikit-learn project. He'll use this experience to make a state of play of how the different advancements in Generative AI and more recently agentic AI are disrupting, for the best and the worst, the way open-source communities are working day after day.<br>\r\n ", "image_description": "", "creation_date": "2026-03-24T17:22:18", "last_modification_date": "2026-03-24T17:22:18", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "SV 1717", "url_place_and_room": "https://plan.epfl.ch/?room==SV%201717", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "<a href=\"https://www.linkedin.com/in/guillaume-lemaitre-b9404939/\">Guillaume Lemaître</a>", "organizer": "", "contact": "Eva Schier", "is_internal": "False", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 3, "fr_label": "Entrée libre", "en_label": "Free" }, "keywords": "open source, coding, innovaiton", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120176/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/416/?format=api", "https://memento.epfl.ch/api/v1/mementos/6/?format=api", "https://memento.epfl.ch/api/v1/mementos/8/?format=api", "https://memento.epfl.ch/api/v1/mementos/9/?format=api", "https://memento.epfl.ch/api/v1/mementos/111/?format=api", "https://memento.epfl.ch/api/v1/mementos/27/?format=api" ] }, { "id": 71443, "title": "Mathematics Colloquium", "slug": "mathematics-colloquium-13", "event_url": "https://memento.epfl.ch/event/mathematics-colloquium-13", "visual_url": "https://memento.epfl.ch/image/32790/200x112.jpg", "visual_large_url": "https://memento.epfl.ch/image/32790/720x405.jpg", "visual_maxsize_url": "https://memento.epfl.ch/image/32790/max-size.jpg", "lang": "en", "start_date": "2026-06-17", "end_date": "2026-06-17", "start_time": "16:15:00", "end_time": "17:15:00", "description": "<strong>Title</strong>: <br>\r\nPositive random walks and positive-semidefinite random matrices<br>\r\n<br>\r\n<strong>Abstract</strong>:<br>\r\nOn the real line, a random walk that can only move in the positive direction is very unlikely to remain close to its origin. After a fixed number of steps, the left tail has a Gaussian profile under minimal assumptions. Remarkably, a similar phenomenon occurs when we consider a positive random walk on the cone of positive-semidefinite matrices. After a fixed number of steps, the minimum eigenvalue is described by a Gaussian random matrix model.<br>\r\nThis talk introduces a new way to make this intuition rigorous. The methodology addresses an open problem in computational mathematics about sparse random embeddings. The presentation targets a general mathematical audience.<br>\r\nPreprint: <a href=\"https://arxiv.org/abs/2501.16578\" target=\"_blank\">https://arxiv.org/abs/2501.16578</a><br>\r\n<br>\r\n<strong>Please register on the following form : </strong>https://forms.gle/ppXwKo9HmTgFk3rc7", "image_description": "", "creation_date": "2026-04-01T11:03:30", "last_modification_date": "2026-04-01T11:03:45", "link_label": "", "link_url": "", "canceled": "False", "cancel_reason": "", "place_and_room": "BCH 2201", "url_place_and_room": "https://plan.epfl.ch/?room==BCH%202201", "url_online_room": "", "spoken_languages": [ "https://memento.epfl.ch/api/v1/spoken_languages/2/?format=api" ], "speaker": "Prof. Joel A. Tropp, Steele Family Professor of Applied & Computational Mathematics, Caltech", "organizer": "Prof. Nicolas Boumal", "contact": "Institute of Mathematics", "is_internal": "True", "theme": "", "vulgarization": { "id": 2, "fr_label": "Public averti", "en_label": "Informed public" }, "registration": { "id": 2, "fr_label": "Sur invitation", "en_label": "Invitation required" }, "keywords": "", "file": null, "icalendar_url": "https://memento.epfl.ch/event/export/120257/", "category": { "id": 1, "code": "CONF", "fr_label": "Conférences - Séminaires", "en_label": "Conferences - Seminars", "activated": true }, "academic_calendar_category": null, "domains": [], "mementos": [ "https://memento.epfl.ch/api/v1/mementos/402/?format=api", "https://memento.epfl.ch/api/v1/mementos/5/?format=api", "https://memento.epfl.ch/api/v1/mementos/7/?format=api" ] } ] }
