@inproceedings { 3604, title = {Base Belief Change for Finitary Monotonic Logics}, booktitle = {13th Conference of the Spanish Association for Artificial Intelligence, CAEPIA 2009}, year = {2009}, month = {09/11/2009}, pages = {337-346}, address = {Sevilla}, abstract = {We slightly improve on characterization results already in the literature for base revision. We show that in order to axiomatically characterize revision operators in a logic the only conditions this logic is required to satisfy are: finitarity and monotonicity. A characterization of limiting cases of revision operators, full meet and maxichoice, is also offered. In the second part of the paper, as a particular case, we focus on the class of graded fuzzy logics and distinguish two types of bases, naturally arising in that context, exhibiting different behavior.}, author = {Pere Pardo and Pilar Dellunde and Llu\'{\i}s Godo} }