Regular monoids generated by two galois connections

Consider a Galois connection (α, α) on an ordered setP and a Galois connection (β, β) on the dually ordered set . Arbitrary compositions of these Galois connections form a monoid. In this paper we will examine this monoid. First we prove that it is a regular monoid and then we construct two special Galois connectionsa andb such that every monoid of the above type is a homomorphic image of the monoid generated bya andb, and we give a solution of the word problem of the latter monoid.