Araújo, JoãoBünau, P. V.Mitchell, James D.Neunhöffer, M.2011-12-132011-12-132010Araújo, João; [et al.] - Computing automorphisms of semigroups. "Journal of Symbolic Computation" [Em linha]. ISSN 0747-7171. Vol. 45, nº 3 (Mar. 2010), p. 373–3920747-7171http://hdl.handle.net/10400.2/1992In this paper an algorithm is presented that can be used to calculate the automorphism group of a finite transformation semigroup. The general algorithm employs a special method to compute the auto- morphism group of a finite simple semigroup. As applications of the algorithm all the automorphism groups of semigroups of order at most 7 and of the multiplicative semigroups of some group rings are found. We also consider which groups occur as the automor- phism groups of semigroups of several distinguished types.engTransformation semigroupsAutomorphism groupjournal article