Geoffrey R. Robinson

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20092025

most citedOn simple endotrivial modules

14 citations · 15 across the 4 of their papers we have counts for

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3 papers · 1 filter

math.RT2025

A generalized character related to the local structure and representation theory of a finite group

Geoffrey R. Robinson

We consider the generalized character $Ψ_{1, p, G}$ of a finite group $G$ which vanishes on all $p$ -singular elements of $G$ and whose value at each $p$ -regular $y \in G$ is the numb…

math.RT2010★ 14 cited

On simple endotrivial modules

Geoffrey R. Robinson

We show that when G is a finite group which contains an elementary Abelian subgroup of order p^2 and k is an algebraically closed field of characteristic p, then the study of simpl…

math.RT2009

On the minimal norm of a non-regular generalized character of an arbitrary finite group

Geoffrey R. Robinson

We prove that for any finite group G, the sum across non-identity elements of the squared absolute value of any generalized character of G which does not vanish on all non-identity…