Document Type : Research Paper
LMAM and School of Mathematical Sciences, Peking University, Beijing, 100871, China.
Chongqing University of Arts and Sciences
In this paper, we give a complete proof of Theorem 4.1(ii) and a new elementary proof of Theorem 4.1(i) in [Li and Shen, On the intersection of the normalizers of the derived subgroups of all
subgroups of a finite group, J. Algebra, 323 (2010) 1349--1357].
In addition, we also give a generalization of Baer's Theorem.