Supported by NSF of China(Grant Nos.10961007,10871210);NSF of Guangxi(Grant No.0991101);Guangxi Education Department
Based on Wielandt's criterion for subnormality of subgroups in finite groups, we study 2-maximal subgroups of finite groups and present another subnormality criterion in finite solvable groups.
Supported by National Natural Science Foundation of China (Grant Nos. 10961007, 10871210);Natural Science Foundation of Guangxi Province (Grant No. 0991101);Guangxi Education Department
A subgroup H of a finitegroup G is called a c*-normal subgroup of G if there exists a
Project supported in part by the National Natural Science Foundation of China (Grant No.10871210);Foundation of Guangdong University of Technology (Grant No.093057)
In this paper, we investigate the structure of the groups whose nontrivial normal subgroups have order two. Some properties of this kind of groups are obtained.
Supported by the National Natural Science Foundation of China (Grant No10871210);the Natural Science Foundation of Guangdong Province (Grant No06023728)
Let X be a nonempty subset of a group G. A subgroup H of G is said to be X- s-permutable in G if there exists an element x E X such that HP^x = P^xH for every Sylow subgroup P of G. In this paper, some new results are...
Supported by National Natural Science Foundation of China (Grant No.10871210);Natural Science Foundation of Guangdong Province (Grant No.06023728)
Suppose that G is a finite group and H is a subgroup of G. We say that H is ssemipermutable in G if HGv = GpH for any Sylow p-subgroup Gp of G with (p, |H|) = 1. We investigate the influence of s-semipermutable su...