English

Higher dimensional algebraic fiberings for pro-$p$ groups

Group Theory 2022-05-17 v1

Abstract

We prove some conditions for higher dimensional algebraic fibering of pro-pp group extensions and we establish corollaries about incoherence of pro-pp groups. In particular, if G=KΓG = K \rtimes \Gamma is a pro-pp group, Γ\Gamma a finitely generated free pro-pp group with d(Γ)2d(\Gamma) \geq 2, KK a finitely presented pro-pp group with NN a normal pro-pp subgroup of KK such that K/NZpK/ N \simeq \mathbb{Z}_p and NN not finitely generated as a pro-pp group, then GG is incoherent (in the category of pro-pp groups). Furthermore we show that if KK is a free pro-pp group with d(K)=2d(K) = 2 then either Aut0(K)Aut_0(K) is incoherent (in the category of pro-pp groups) or there is a finitely presented pro-pp group, without non-procyclic free pro-pp subgroups, that has a metabelian pro-pp quotient that is not finitely presented i.e. a pro-pp version of a result of Bieri-Strebel does not hold.

Keywords

Cite

@article{arxiv.2205.07418,
  title  = {Higher dimensional algebraic fiberings for pro-$p$ groups},
  author = {Dessislava H. Kochloukova},
  journal= {arXiv preprint arXiv:2205.07418},
  year   = {2022}
}
R2 v1 2026-06-24T11:18:02.444Z