Complementary series

par Prof. Jean-François Quint (CNRS & Université de Bordeaux)

mercredi 25 avr. 2018, 14:30 → 15:45 Europe/Paris

Amphithéâtre Léon Motchane (IHES)

Complementary series are families of unitary representations of certain semisimple Lie groups and of groups of automorphisms of homogeneous trees. I wil recall their definition for semisimple groups and explain how to prove their existence for groups of automorphisms of trees by a method which allows to extend this construction in order to build new representations of free groups.