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A DESCRIPTION OF NORMAL SEMIGROUPS OF ENDOMORPHISMS OF PROPER INDEPENDENCE ALGEBRAS

Let A be a strong independence algebra of finite rank with at most one constant, and let G he the group of automorphisms of A. Let α be a singular endomorphism of αG = 〈{α} U G〉. We describe the elements of αG and give additional characterisations when A is a proper independence algebra and G is a periodic group.