De Emily Stark
One type of rigidity theorem proves that a group’s geometry determines its algebra, typically up to virtual isomorphism. We study graphically discrete groups, which impose a discreteness criterion on the automorphism group of any graph the group acts on geometrically. It follows that if a graphically discrete group acts geometrically on the same locally finite graph as another group, then the two are virtually isomorphic. Classic examples of graphically discrete groups include virtually nilpotent groups and fundamental groups of closed hyperbolic manifolds. We will present new examples and demonstrate this property is not a quasi-isometry invariant. We will discuss rigidity phenomena for free products of graphically discrete groups. This is joint work with Alex Margolis, Sam Shepherd, and Daniel Woodhouse.
De Koji Fujiwara
De Emily Stark
De Kathryn Mann
De Pallavi Dani
De Carolyn Abbott
De Alice Kerr
De Jean Lecureux
De Nir Lazarovich
De Sam Shepherd
De Alessandro Sisto
De Stephen Coombes , Peter Liddle
De Ariane Trescases
De Albert Schwarz
De Stephen Coombes , Peter Liddle
De Victor Kleptsyn
De François-Xavier Vialard
