Distinguished Algebraic Semantics for t-norm Based Fuzzy Logics: Methods and Algebraic Equivalencies
Abstrakt
This paper is a contribution to the algebraic study of t-norm based fuzzy logics. In the general framework of propositional core and Delta-core fuzzy logics we consider three properties of completeness with respect to any semantics of linearly ordered algebras. Useful algebraic characterizations of these completeness properties are obtained and their relations are studied. Moreover, we concentrate on five kinds of distinguished semantics for these logics, study their relationships, characterization and we survey the known completeness methods and results for prominent logics. Finally, all completeness properties and distinguished semantics are also considered for the first-order versions of the logics where a number of new results are proved.