37 citations · 116 across the 14 of their papers we have counts for
15 papers
Torsion Free Endotrivial Modules for Finite Groups of Lie Type
Jon F. Carlson, Jesper Grodal, Nadia Mazza +1
In this paper we determine the torsion free rank of the group of endotrivial modules for any finite group of Lie type, in both defining and non-defining characteristic. On our way…
String topology of finite groups of Lie type
Jesper Grodal, Anssi Lahtinen
We show that the mod cohomology of any finite group of Lie type in characteristic different from admits the structure of a module over the mod cohomology o…
Endotrivial modules for finite groups via homotopy theory
Jesper Grodal
Classifying endotrivial kG-modules, i.e., elements of the Picard group of the stable module category for an arbitrary finite group G, has been a long-running quest. By deep work of…
Group cohomology and control of p-fusion
David Benson, Jesper Grodal, Ellen Henke
We show that if an inclusion of finite groups H < G of index prime to p induces a homeomorphism of mod p cohomology varieties, or equivalently an F-isomorphism in mod p cohomology,…
The classification of p-compact groups and homotopical group theory
Jesper Grodal
We survey some recent advances in the homotopy theory of classifying spaces, and homotopical group theory. We focus on the classification of p-compact groups in terms of root data…
The Steenrod problem of realizing polynomial cohomology rings
Kasper K. S. Andersen, Jesper Grodal
In this paper we completely classify which graded polynomial R-algebras in finitely many even degree variables can occur as the singular cohomology of a space with coefficients in…