Seminário LisMath 

26/06/2018, 12:00 — 12:30 — Sala 6.2.33, Faculdade de Ciências da Universidade de Lisboa
Filipe Gomes, LisMath, Faculdade de Ciências, Universidade de Lisboa

Supercharacter Theories and Multiplicative Ramification Graphs

Supercharacter theories are generalizations of the usual character theory of a group. In this talk, we construct graded graphs using restriction and superinduction of supercharacters and use them to determine the extreme supercharacters of direct limits of certain groups. We mention the infinite unitriangular group as a particularly important example of this construction.