28 citations · 49 across the 17 of their papers we have counts for
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math.GR2023
Gassmann triples with special cycle types and applications
Holger Kammeyer, Steffen Kionke
We show that if one of various cycle types occurs in the permutation action of a finite group on the cosets of a given subgroup, then every almost conjugate subgroup is conjugate.…
math.GR2023★ 2 cited
Bounded cohomology is not a profinite invariant
Daniel Echtler, Holger Kammeyer
We construct pairs of residually finite groups with isomorphic profinite completions such that one has non-vanishing and the other has vanishing real second bounded cohomology. The…
math.GR2023
Galois cohomology and profinitely solitary Chevalley groups
Holger Kammeyer, Ryan Spitler
For every number field and every Cartan Killing type, there is an associated split simple algebraic group. We examine whether the corresponding arithmetic subgroups are profinitely…