设F是一个群类。群G的子群H称为在G中F-S-可补的,如果存在G的一个子群K使得G=HK且K/K∩HG∈F,并称K为H的一个F-S-补,其中HG=Core(H)=∩g∈GHg是包含在H中G的最大正规子群。利用子群的F-S-可补性得到了F群的一些新的判别准则。
Let F be a class of groups.A subgroup H of a group G is called F-S-supplemented in G if there exists a subgroup K of G such that G=HK and K/K∩HG∈F,where HG=Core(H)=∩g∈GHg is the maximal normal subgroup of G contained in H.With the F-S-supplemented of subgroups,we give some new criteria of F-group.