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193. 26/10/2026 Joost Vercruysse (Université Libre de Bruxelles, Belgium)
Title: Partial representation theory
Abstract: The non-associativity in this talk concerns actions rather than algebras. In the case of a so-called partial representation of a group, or more generally of a Hopf algebra, the usual associativity constraint for the associated action is weakened in the sense that it is only valid in the presence of a “witness”. This weaker version of associativity can, however, still be interpreted as associativity in the usual sense, but the price to pay for this is that the group needs to be replaced by a groupoid (and the Hopf algebra by a Hopf algebroid). The category of partial representations for a given group or Hopf algebra has many interesting properties and provides us with more information than the usual representation category, which it contains as a full subcategory. In this talk, I want to present an overview of this theory, some recent developments, and remaining challenges.
Future talks:
194. 02/11/2026 Diego Aranda-Orna (University of Oviedo, Spain)
195. 09/11/2026 Inna Entova-Aizenbud (Ben Gurion University of the Negev, Israel)
196. 16/11/2026 Anupam Singh (Indian Institute of Science Education and Research, India)
197. 23/11/2026 Louis Olyslager (Ghent University, Belgium)
198. 30/11/2026 Matevž Miščič (University of Ljubljana, Slovenia)
199. 07/12/2026 Ernesto Spinelli (Sapienza University of Rome, Italy)
200. 14/12/2026 Maria Matushko (Steklov Mathematical Institute of RAS, Russia)
- - -. 21/12/2026 XXV Non-Associative Day in Online´26
201. 04/01/2027 Diogo Diniz (Federal University of Campina Grande, Brazil)
202. 11/01/2027 Mikhail Venchakov (HSE University, Russia)
203. 18/01/2027 Yunnan Li (Guangzhou University, China)
204. 25/01/2027 Kauê Orlando Pereira (State University of Campinas, Brazil)
205. 01/02/2027 Raquel Villacampa (University of Zaragoza, Spain)
206. 08/02/2027 Ramon Esteban-Romero (University of Valencia, Spain)
207. 15/02/2027 Zeyu Hao (Northeast Normal University, China)
208. 22/02/2027 Yuxiang Xiao (Nankai University, China)
209. 01/03/2027 Sacha Ikonicoff (University of Strasbourg, France)
210. 08/03/2027 Elena Pascucci (University of Porto, Portugal)
211. 15/03/2027 Georgy Sharygin (Lomonosov Moscow State University, Russia)
212. 22/03/2027 Ivan Beldiev (HSE University, Russia)
213. 29/03/2027 Ulrich Kraehmer (Dresden University of Technology, Germany)
214. 05/04/2027 Javier Rández-Ibáñez (University of La Rioja, Spain)
215. 12/04/2027 Victoria Lebed (University of Caen - Normandie, France)
216. 19/04/2027 Guillermo Vera de Salas (Rey Juan Carlos University, Spain)
217. 26/04/2027 Vladimir Salnikov (La Rochelle University, France)
218. 03/05/2027 Hongdi Huang (Shanghai University, China)
219. 10/05/2027 Aharon Razon (Elta Systems Ltd., Israel)
220. 17/05/2027 Pragya Belwal (Indian Institute of Science Education and Research Mohali, India)
222. 31/05/2027 Johan Öinert (Blekinge Institute of Technology, Sweden)
223. 07/06/2027 Souvik Pal (Christ University, India)
224. 14/06/2027 Antonio Ioppolo (University of L’Aquila, Italy)
225. 21/06/2027 Coline Emprin (Stockholm University, Sweden)
227. 05/07/2027 Sven Möller (Maynooth University, Ireland)
228. 12/07/2027 Tomislav Šikić (University of Zagreb, Croatia)
231. 02/08/2027 Uhi Rinn Suh (Seoul National University, South Korea)
232. 09/08/2027 Leonid Ryvkin (Claude Bernard University Lyon 1, France)
234. 23/08/2027 Guilai Liu (University of Strasbourg, France)
235. 30/08/2027 Dimitra-Dionysia Stergiopoulou (University of Thessaly, Greece)
236. 06/09/2027 Louis Olyslager (Ghent University, Belgium)
240. 04/10/2027 Veronika Pedić (University of Zagreb, Croatia)
Ivan Kaygorodov • Salvatore Siciliano • Mykola Khrypсhenko • Jobir Adashev