Interpolation Properties for Uninorm Based Logics

Craig and deductive interpolation properties are investigated for uninorm based fuzzy logics. In particular, it is shown that for a restricted language, the only extensions of monoidal t-norm logic with Craig interpolation are classical logic, Godel logic, and three-valued Godel logic. Quantifier elimination in an appropriate language and the amalgamation, deductive interpolation and Craig interpolation properties are established for the logics based on idempotent residuated uninorms with an involutive negation.