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Seminario de Álgebra
Seminario de Álgebra

Fecha, Lugar: 24 de mayo a las 11:30 en 420

Conferenciante: Yago Antolin

(UAM)

Título: Residual finiteness of some outer automorphism groups

Abstract: In this talk, I will review the concept of a residual finite group and justify why this is an interesting property. I show that the outer automorphism group of a free group is residually finite. Then I will indicate how this proof generalizes to other groups of negative curvature and in particular explain the following statement: In a torsion-free acylindrically hyperbolic group, every automorphism that preserves conjugacy classes is inner (i.e. given by a global conjugation).  This is based on a joint work with A. Minasyan and A. Sisto.
Location  Fecha, Lugar: 24 de mayo a las 11:30 en 420