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math.LO2020
Dp-minimal profinite groups and valuations on the integers
Tim Clausen
We study dp-minimal infinite profinite groups that are equipped with a uniformly definable fundamental system of open subgroups. We show that these groups have an open subgroup …
math.GR2020
On the geometry of sharply 2-transitive groups
Tim Clausen, Katrin Tent
We show that the geometry associated to certain non-split sharply 2-transitive groups does not contain a proper projective plane. For a sharply 2-transitive group of finite Morley…