activity
20162025
most citedFree products in the unit group of the integral group ring of a finite group

5 citations · 6 across the 5 of their papers we have counts for

collaborators

5 papers

math.RT2025

Representing in Low Rank I: conjugacy, topological and homological aspects

Robynn Corveleyn, Geoffrey Janssens, Doryan Temmerman

In this series of papers, we investigate properties of a finite group which are determined by its low degree irreducible representations over a number field , i.e. its represent…

math.GR2025

Simultaneous ping-pong for finite subgroups of reductive groups

Geoffrey Janssens, Doryan Temmerman, François Thilmany

Let be a Zariski-dense subgroup of a reductive group defined over a field . Given a finite collection of finite subgroups () of a…

math.GR2018★ 1 cited

A dichotomy for integral group rings via higher modular groups as amalgamated products

Andreas Bächle, Geoffrey Janssens, Eric Jespers +2

We show that , the unit group of the integral group ring , either satisfies Kazhdan's property (T) or is, up to commensurability, a non-triv…

math.GR2018

Abelianization and fixed point properties of units in integral group rings

Andreas Bächle, Geoffrey Janssens, Eric Jespers +2

Let be a finite group and the unit group of the integral group ring . We prove a unit theorem, namely a characterization of when $\ma…

math.RA2016★ 5 cited

Free products in the unit group of the integral group ring of a finite group

Geoffrey Janssens, Eric Jespers, Doryan Temmerman

Let be a finite group and let be a prime. We continue the search for generic constructions of free products and free monoids in the unit group of…