Embedding semigroups in semibands of depth two
The author gives a new simple proof of the following theorem: Any semigroup \(S\) may be embedded in a regular semigroup \(T\) in which every element is a product of two idempotents. If \(S\) is finite, then \(T\) is finite. The new proof improves on the upper bound on the order of \(T\) over previous proofs.
scientific article; zbMATH DE number 815970