COpref.共同；一起；联合abbr.公司（=company）abbr.郡；县（=county）abbr.指挥官（=Commanding Officer）coarct[医] 紧压

1. If moreover the automorphism involved is of finite order, some special orbits are related to the nonabelian cohomology of a finite cyclic group.
   当扭共轭作用中的自同构为有限阶时，某些特殊的轨道对应于有限循环群的非交换上同调。