substituted impurity

Polycyclic semigroup was investigated,the permutation property of the polycyclic semigroup was discussed,and it was proved by means of full-inductive method that polycyclic semigroup has permutation property n,n≥3.

研究多循环半群,讨论多循环半群的置换性质,用完全归纳法证明当n≥3时,多循环半群有置换性质^Pn。

The permutation property of the bicyclic semigroup has been discussed, and the results have shown that the bicyclic semigroup has P (n≥4).

主要讨论了双循环半群的置换性质 ,证明了当 n≥ 4时 ,双循环半群有置换性质 P*