Explore an in-depth conference talk on counting non-tempered automorphic forms using endoscopy, presented by Mathilde Gerbelli-Gauthier at the Centre International de Rencontres Mathématiques in Marseille, France. Delve into advanced mathematical concepts during this hour-long presentation, which was part of the thematic meeting on "Automorphic forms, endoscopy and trace formulas" held on September 21, 2023. Access this video and other talks by renowned mathematicians through CIRM's Audiovisual Mathematics Library, featuring chapter markers, keywords, enriched content with abstracts and bibliographies, and a multi-criteria search function for easy navigation through mathematical topics.