English

Bogomolov multipliers of $p$-groups of maximal class

Group Theory 2019-09-02 v3

Abstract

Let GG be a pp-group of maximal class and order pnp^n. We determine whether or not the Bogomolov multiplier B0(G)B_0(G) is trivial in terms of the lower central series of GG and P1=CG(γ2(G)/γ4(G))P_1 = C_G(\gamma_2(G) / \gamma_4(G)). If in addition GG has positive degree of commutativity and P1P_1 is metabelian, we show how understanding B0(G)B_0(G) reduces to the simpler commutator structure of P1P_1. This result covers all pp-groups of maximal class of large enough order and, furthermore, it allows us to give the first natural family of pp-groups containing an abundance of groups with nontrivial Bogomolov multipliers. We also provide more general results on Bogomolov multipliers of pp-groups of arbitrary coclass rr.

Keywords

Cite

@article{arxiv.1609.03525,
  title  = {Bogomolov multipliers of $p$-groups of maximal class},
  author = {Gustavo A. Fernández-Alcober and Urban Jezernik},
  journal= {arXiv preprint arXiv:1609.03525},
  year   = {2019}
}

Comments

17 pages; referees' comments, improved exposition, more details in proofs