A. Kupers

activity

20112026

most citedSome finiteness results for groups of automorphisms of manifolds

18 citations · 135 across the 39 of their papers we have counts for

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math.AT2026

Double Steinberg coinvariants for special linear groups

Tatiana Abdelnaim, David Chan, Alexander Kupers +2

For a field $F$ we study the coinvariants for the $S L_{n} (F)$ -action on the double Steinberg module $S t_{n} (F) \otimes S t_{n} (F)$ and show they have a rich algebraic structure: for $n =…

math.AT2026

The Morita classes are nonzero

Alexander Kupers, Jeremy Miller, Peter Patzt

We prove that all Morita classes $μ_{k} \in H_{4 k} (A u t (F_{2 k + 2}); Q)$ are nonzero using a novel description of the Hopf algebra structure on Steinberg homology. We prove anal…