%0 Journal Article
%T Linear growth for semigroups which are disjoint unions of finitely many copies of the free monogenic semigroup
%A Nabilah Abughazalah
%A Pavel Etingof
%J Mathematics
%D 2015
%I arXiv
%X We show that every semigroup which is a finite disjoint union of copies of the free monogenic semigroup (natural numbers under addition) has linear growth. This implies that the the corresponding semigroup algebra is a PI algebra.
%U http://arxiv.org/abs/1505.02149v1