有限群G的子群H称为G的半正规子群,若H与G的每个满足条件(|K|,|H|)=1的子群K使得HK=KH成立.若有限群G的每个Sylow子群的极大子群都在G中半正规,则称G为SMSN-群.给出内SMSN-群(群G的每个真子群是SMSN-群但G本身不是SMSN-群)的分类.
A subgroup H of a finite group G is called a seminormal subgroup of G if HK=KH for every subgroup K with(|K|,|H|)=1.A finite group G is called an SMSN-group if all maximal subgroups of the Sylow subgroups of G are seminormal in G.This paper has given a classification of minimal non-SMSN-groups(groups which are not SMSN-groups but whose proper subgroups are all SMSN-groups).