加载中…
Given finite groups , a representation of is called center-preserving on if the only elements of that become central under are those that were already central in . We prove that if has a faithful irreducible representation , then at least one of the irreducible components of the induction is center-preserving on . In consequence, has a faithful irreducible representation if and only if every finite group containing as a subgroup has an irreducible representation whose restriction to is faithful, and which is center-preserving on . In addition, we give examples illustrating the sharpness of the statement, and discuss the connection with projective representations.

生成讲解博客的中文版本

生成AI智能校验的中文版本