短語詞組短語linear group over ring 環(huán)上的線性群group control ring communication 群控strongly group graded ring 強(qiáng)分次環(huán)infinite group grading ring 無限群分次環(huán)group graded ring 分次環(huán)two -group associative ring 雙群結(jié)合環(huán)modified group ring [數(shù)]修正群環(huán)shew group ring 斜群環(huán)skew group ring 斜群環(huán) 返回 group ring