On left C-wrpp semigroups

摘要

It is known that a C-rpp semigroup can be described as a strongsemilattice of left cancellative monoids. In this paper, weintroduce the class of left C-wrpp semigroups which includes theclass of left C-rpp semigroups as a subclass. We shallparticularly show that the semi-spined product of a left regularband and a C-wrpp semigroup forms a curler which is a leftC-wrpp semigroup and vice versa. Results obtained by Fountainand Tang on C-wrpp semigroups are extended and strengthened.