A note on primeness of semigroup rings
Pedro V. Silva · Proceedings of the Royal Society of Edinburgh Section A Mathematics · 1992
Synopsis This note discusses primeness for semigroup rings of semigroups satisfying a certain condition, weaker than the u.p. property. These semigroups include free products of semigroups, semigroups presented by a single relator and at least three generators, and free inverse semigroups of infinite rank.