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math.GR2021
Connected components of Morse boundaries of graphs of groups
Elia Fioravanti, Annette Karrer
Let a finitely generated group split as a graph of groups. If edge groups are undistorted and do not contribute to the Morse boundary , we show that every connecte…
math.GR2021
The boundary rigidity of lattices in products of trees
Kasia Jankiewicz, Annette Karrer, Kim Ruane +1
We show that every group acting freely and vertex-transitively by isometries on a product of two regular trees of finite valence is boundary rigid. That means that every CAT(0) spa…
math.GT2021
Right-angled Coxeter groups with totally disconnected Morse boundaries
Annette Karrer
This paper introduces a new class of right-angled Coxeter groups with totally disconnected Morse boundaries. We construct this class recursively by examining how the Morse boundary…