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math.GR2023★ 1 cited
Absolute profinite rigidity, direct products, and finite presentability
M. R. Bridson, A. W. Reid, R. Spitler
We prove that there exist finitely presented, residually finite groups that are profinitely rigid in the class of all finitely presented groups but not in the class of all finitely…
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…