Subgroup Theorems for the $\widetilde{B_0}$-invariant of groups

Abstract

U. Jezernik and P. Moravec have shown that if $G$ is a finite group with a subgroup $H$ of index $n$, then nth power of the Bogomolov multiplier of $G$, $\widetilde{B_0}(G{)}^n$ is isomorphic to a subgroup of $\widetilde{B_0}(H)$. In this paper we want to prove a similar result for the center by center by $w$ variety of groups, where $w$ is any outer commutator word.