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Title: A logical approach to fuzzy truth hedges

Authors: Francesc Esteva, Llus Godo, Carles Noguera

Abstract: The starting point of this paper are the works of H jek and Vychodil on the axiomatization of truth-stressing and-depressing hedges as expansions of H jek s BL logic by new unary con- nectives. They showed that their logics are chain-complete, but standard completeness was only proved for the expansions over G del logic. We propose weaker axiomatizations over an arbitrary core fuzzy logic which have two main advantages: (i) they preserve the standard completeness properties of the original logic and (ii) any subdiagonal (resp. super- diagonal) non-decreasing function on [0, 1] preserving 0 and 1 is a sound interpretation of the truth-stresser (resp. depresser) connectives. Hence, these logics accommodate most of the truth hedge functions used in the literature about of fuzzy logic in a broader sense.   

Publish Year: 2013

Publisher: Information Sciences - Science Direct

موضوع: منطق فازی

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