Holger Kammeyer

activity

20122026

most citedThe Farrell-Jones conjecture for arbitrary lattices in virtually connected Lie groups

28 citations · 49 across the 17 of their papers we have counts for

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3 papers · 1 filter

math.GR2026

Profinite recognition of uniformity

Holger Kammeyer

Let $G$ be a semisimple Lie group that is not isogenous to the isometry group of real or complex hyperbolic $n$ -space. We show that the rational rank is a profinite invariant for i…

math.GR2026

A counterexample to the determinant approximation conjecture

Holger Kammeyer

The determinant approximation conjecture states that for a residually finite group $G$ and a chain $G_{i}$ of finite index normal subgroups with trivial intersection, the Fuglede-Kad…

math.GR2026

Congruence rigidity of algebraic groups

Adrian Baumann, Holger Kammeyer

We identify the simple algebraic groups over number fields that are, in a suitable sense, determined by their finite adele points. Assuming CSP and Grothendieck rigidity, our resul…