设H是有限群G的正规子群使得G/H为p-幂零群,P是H的一个Sylowp-子群.若NG(P)为p-幂零群且下列条件之一成立,则G是p-幂零群:(1)P的极大子群在G中半覆盖-远离或Fp(H)-半置换;(2)P的二次极大子群在G中半覆盖-远离或Fp(H)-半置换.
Let H be a normal subgroup of a finite group G such that G/H is p-nilpotent and let P be a Sylow p-subgroup of H.If NG(P) is p-nilpotent and one of the following holds,then G is p-nilpotent:(1) Every maximal subgroup of P is either semi-cover-avoiding or Fp(H)-semipermutable in G;(2) Every 2-maximal subgroup of P is either semi-cover-avoiding or Fp(H)-semipermutable in G.