A subgroup H of a group G is called s-conditionally permutable in G if for every Sylow subgroup T of G there exists an e......

Let A be a subgroup of a group G and X be a nonempty subset of G. A is said to be X-semipermutable in G if A has a suppl......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

利用子群的共轭类的数目，研究了有限群。在较弱的条件下给出了有限群的可直分解性的几个刻画及有限可解群的超可解性与素数幂阶循环......