Fountain, JohnAraújo, João2011-12-232011-12-232005Fountain, John; Araújo, João - A description of normal semigroups of endomorphisms of proper independence algebras. "Communications in Algebra" [Em linha]. ISSN 0092-7872 (Print) 1532-4125 (Online). Vol. 33, nº 8 (2005), p. 2705-27110092-7872http://hdl.handle.net/10400.2/2009Let A be a strong independence algebra of finite rank with at most one constant, and let G be the group of automorphisms of A . Let \alpha be a singular endomorphism of A and \alpha^G = < {\alpha}U G > . We describe the elements of \alpha^G and give additional characterisations when A is a proper independence algebra and G is a periodic group.engIndependence algebrasMonoidsSemigroupsjournal article