The reversible gel is a kind of high molecular polymer.It has peculiar thermal invertibility and peculiar thermal sensitivity.

热可逆凝胶是一种高分子聚合物，具用独特的热可逆性。

This paper is a study on the invertibility of the commutator of scalar-idempotent elements and scalar-involutory elements of a unitary ring.

本文研究在一个有单位元的环中两个倍幂等元的换位子与两个倍对合元的换位子的可逆性问题。