Abstract
Let X be a nonempty set and P(X) the power set of X. The aim of this paper is to provide an explicit description of the monoid End1P(X)(P(X)) of unital ring endomorphisms of the Boolean ring P(X) and the automorphism group Aut(P(X)) when X is finite. Among other facts, it is shown that if X has cardinality n & GE;1, then End1P(X)(P(X)) approximately equal to Tnop, where Tn is the full transformation monoid on the set X and Aut(P(X)) approximately equal to Sn.