English

On the group pseudo-algebra of finite groups

Group Theory 2024-02-21 v1

Abstract

Let GG be a finite group. The group pseudo-algebra of GG is defined as the multi-set C(G)={(d,mG(d))dCod(G)},C(G)=\{(d,m_G(d))\mid d\in{\rm Cod}(G)\}, where mG(d)m_G(d) is the number of irreducible characters of with codegree dCod(G)d\in {\rm Cod}(G). We show that there exist two finite pp-groups with distinct orders that have the same group pseudo-algebra, providing an answer to Question 3.2 in \cite{Moreto2023}. In addition, we also discuss under what hypothesis two pp-groups with the same group pseudo-algebra will be isomorphic.

Keywords

Cite

@article{arxiv.2402.12648,
  title  = {On the group pseudo-algebra of finite groups},
  author = {Mark L. Lewis and Quanfu Yan},
  journal= {arXiv preprint arXiv:2402.12648},
  year   = {2024}
}