Fermé, Eduardo LeopoldoRodrigues, Sara Xavier Reis Gonçalves2016-05-192016-06-192015-11http://hdl.handle.net/10400.13/1164In this dissertation we present a model for iteration of Katsuno and Mendelzon’s Update, inspired in the developments for iteration in AGM belief revision. We adapt Darwiche and Pearls’ postulates of iterated belief revision to update (as well as the independence postulate proposed in [BM06, JT07]) and show two families of such operators, based in natural [Bou96] and lexicographic revision [Nay94a, NPP03]. In all cases, we provide a possible worlds semantics of the models.engCrençaRevisãoAtualizaçãoModelos matemáticosKatsunoMendelzonIteraçãoTécnica matemáticaAnálise numéricaSemânticaFormalMundos possíveisRaciocínio lógico-matemáticoBelief changeBelief updateKatsuno and Mendelzon UpdateIterationPossible world semanticMatemática.Faculdade de Ciências Exatas e da Engenhariamaster thesis201160048