%A GAO Hui, GAO Sheng-zhe, YIN Li %T On the s-θ-completions for subgroups %0 Journal Article %D 2015 %J JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) %R 10.6040/j.issn.1671-9352.0.2014.147 %P 43-46 %V 50 %N 02 %U {http://lxbwk.njournal.sdu.edu.cn/CN/abstract/article_2651.shtml} %8 2015-02-20 %X The notion of s-θ-completions of a proper subgroup of a finite group is introduced. Some new characterizations of the solvable, supersolvable groups are obtained by s-θ-completions of 2-maximal subgroups.