RUS  ENG
Full version
JOURNALS // Trudy Instituta Matematiki i Mekhaniki UrO RAN // Archive

Trudy Inst. Mat. i Mekh. UrO RAN, 2025 Volume 31, Number 4, Pages 290–299 (Mi timm2230)

A note on the non-solvable formation $\hat{\mathfrak{J}_{pr}}r$

W. Zhoua, L. Miaoa, B. Gaob, R. Lia

a Hohai University
b YiLi Normal University

Abstract: In this paper, we extend the formation $\hat{\mathfrak{J}_{pr}}$, which is generated by the class $\mathfrak{J}_{pr}$ originally introduced by Demina and Maslova. The class $\mathfrak{J}_{pr}$ consists of finite groups in which every non-solvable maximal subgroup has a primary index. Building upon this framework, we introduce and study two generalized formations, denoted by $\hat{\mathfrak{J}}$ and $\hat{\mathfrak{J}_{p}}$, which are obtained by involving minimal non-solvable maximal subgroups and applying a localization approach to maximal subgroups. We establish new sufficient conditions under which a finite group belongs to these formations. In addition, we give examples of non-solvable groups to illustrate the distinctions between the class $\mathfrak{J}_{pr}$ and its generalizations.

Keywords: formation, non-solvable group, second maximal subgroup, the core of subgroup.

MSC: 20D10, 20D20

Received: 22.05.2025
Revised: 25.08.2025
Accepted: 08.09.2025

Language: English

DOI: 10.21538/0134-4889-2025-31-4-290-299



Bibliographic databases:


© Steklov Math. Inst. of RAS, 2026