English

groups with the same number of centralizers

Group Theory 2019-06-25 v1

Abstract

For any group GG, let nacent(G)nacent(G) denote the set of all nonabelian centralizers of GG. Amiri and Rostami in (Publ. Math. Debrecen 87/3-4 (2015), 429-437) put forward the following question: Let H and G be finite simple groups. Is it true that if nacent(H)=nacent(G)|nacent(H)| = |nacent(G)|, then GG is isomorphic to HH? In this paper, among other things, we give a negative answer to this question.

Cite

@article{arxiv.1906.09424,
  title  = {groups with the same number of centralizers},
  author = {K. Khoramshahi and M. Zarrin},
  journal= {arXiv preprint arXiv:1906.09424},
  year   = {2019}
}

Comments

5 pages

R2 v1 2026-06-23T10:00:36.335Z