%0 Journal Article %T A Model Theoretical Generalization of Steinitz¡¯s Theorem %A Alexandre Martins Rodrigues %A Edelcio de Souza %J Principia : an International Journal of Epistemology %D 2011 %I Universidade Federal de Santa Catarina, Brasil %X Infinitary languages are used to prove that any strong isomorphism of substructures of isomorphic structures can be extended to an isomorphism of the structures. If the structures are models of a theory that has quantifier elimination, any isomorphism of substructures is strong. This theorem is a partial generalization of Steinitz¡¯s theorem for algebraically closed fields and has as special case the analogous theorem for differentially closed fields. In this note, we announce results which will be proved elsewhere. %K Strong isomorphism %K infinitary languages %K isomorphism extension %K quantifier elimination. %U http://www.periodicos.ufsc.br/index.php/principia/article/view/1808-1711.2011v15n1p107/20556