We cordially invite you to a series of two lectures by Leo Margolis (Universidad Autónoma de Madrid), an outstanding specialist in algebra, in particular in problems related to group rings. He is, among others, the co-author of the first ever counterexample to the famous Zassenhaus Conjecture regarding unity in group rings, which, despite the efforts of many researchers, remained unresolved for over 40 years.

The lecture entitled On the Modular Isomorphism Problem will take place:
- on Thursday, June 12 at 14:15 in room 3220 (first part)
- on Friday, June 13 at 14:15 in room 3240 (second part)