Olga Varghese

activity

20112025

most citedFixed points for actions of Aut(Fn) on CAT(0) spaces

7 citations · 16 across the 17 of their papers we have counts for

collaborators

Showing 2019Show all

6 papers · 1 filter

math.GR2019

A Nunke type classification in the locally compact setting

Samuel M. Corson, Olga Varghese

In this short note we prove that a group G is lcH-slender -- that is, every abstract group homomorphism from a locally compact Hausdorff topological group to G has an open kernel -…

math.GR2019

On number of ends of graph products of groups

Olga Varghese

Given a finite simplicial graph $Γ = (V, E)$ with a vertex-labelling $φ : V \to {non-trivial finitely generated groups}$ , the graph product $G_{Γ}$ is the free p…

math.GR2019

Conjugating automorphisms of graph products: Kazhdan's property (T) and SQ-universality

Anthony Genevois, Olga Varghese

An automorphism of a graph product of groups is conjugating if it sends each factor to a conjugate of a factor (possibly different). In this article, we determine precisely when th…

math.GR2019

On hyperbolicity and virtual freeness of automorphism groups

Olga Varghese

We show that word hyperbolicity of automorphism groups of graph products $G_{Γ}$ and of Coxeter groups $W_{Γ}$ depends strongly on the shape of the defining graph $Γ$ . We also characte…

math.GR2019★ 1 cited

On property (T) for automorphism groups of graph products

Nils Leder, Olga Varghese

We show that the automorphism group of a graph product of finite groups $A u t (G_{Γ})$ has Kazhdan's property (T) if and only if $Γ$ is a complete graph.

math.GR2019

Abstract homomorphisms from locally compact groups to discrete groups

Linus Kramer, Olga Varghese

We show that every abstract homomorphism $φ$ from a locally compact group $L$ to a graph product $G_{Γ}$ , endowed with the discrete topology, is either continuous or $φ (L)$ lies in a…