一个群G的子群H被称为CAP-子群,若它满足H或是覆盖或是避开G的每一个主因子.群G的子群H被称为半CAP-子群,若它满足H或是覆盖或是避开G的某个固定主群列的每一个主因子.本文通过假定群G的某些子群为CAP-子群或半CAP-子群,给出了群的可解性的某些刻画.
We call a subgroup H of a finite group G a CAP-subgroup of G, if H cover or avoids every chief factor L/K of G. If for a given chief series of G, we have H cover or avoids every chief factor of this chief series. We call H a semi-CAP-subgroup of G. In this paper,by assuming some subgroups of G are CAP-subgroup or semi-CAP-subgroup of G. We get some results about the solvability of G.