THE CENTENNIAL OF THE INTERNATIONAL MATHEMATICAL UNION Mathematics Without Borders D: E L U D E H C S RE 21 0 2 R E B M E T 27–28 SEP 289 EPTM S BER 20 STRASBOURG Annalisa Buffa Jean-Luc Dorier Hélène Esnault Étienne Ghys Subhash Khot Stéphane Mallat Hiraku Nakajima Laure Saint-Raymond Norbert Schappacher Stanislav Smirnov Gang Tian Ulrike Tillmann Marcelo Viana imucentennial2020.math.unistra.fr Institut de Recherche Mathématique Avancée