Extensions of several coprime results to good action case
Abstract
Let GG and AA be groups where AA acts on GG by automorphisms. We say “the action of AA on GG is good” if the equality H=[H,B]CH(B)H=[H,B]CH(B) holds for any subgroup BB of AA and for any BB-invariant subgroup HH of GG. It is straightforward that every coprime action is a good action. In this work, we extend some results due to Ward, Gross, Shumyatsky, Jabara and Meng and Guo under coprime action to good action.
Communicated by M. Lewis