Howson's Property for Semidirect Products of Semilattices by Groups
Pedro V. Silva, Filipa Soares · Communications in Algebra · 2016
An inverse semigroup S is a Howson inverse semigroup if the intersection of finitely generated inverse subsemigroups of S is finitely generated. Given a locally finite action θ of a group G on a semilattice E, it is proved that E*θG is a Howson inverse semigroup if and only if G is a Howson group. It is also shown that this equivalence fails for arbitrary actions.