Abstract. A description is obtained of all pseudocomplemented semilattices $S$ for which the set of idempotent endomorphisms is closed under composition. Those $S$ for which the endomorphism monoid is orthodox are then identified.
AMS Subject Classification
(1991): 06A12, 20M19; 08A35
Keyword(s):
Endomorphism monoid,
orthodox semigroup,
regular semigroup,
pseudocomplemented semilattice
Received September 4, 1995. (Registered under 5667/2009.)
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