称半群S为2-半带,若其中每个元素都可以写为S中两个幂等元的积.证明了任意半群可嵌入一个2-双单半带.
A semigroup S is called 2-semiband, if every element of S is a product of two idempotents of S. In this paper, it is proved that any semigroup can be embedded into a 2-bisimple semiband.