Migrativity of Uninorms over T-norms and T-conorms

In this paper the notions of alpha-migrative uniforms over a fixed t-norm T and over a fixed t-conorm S are introduced and studied. All cases when the uninorm U lies in any one of the most usual classes of uninorms are analyzed, characterizing with some assumptions on continuity all solutions of the migrativity equation for all possible combinations of U and T and for all possible combinations of U and S.