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Title

A logical approach to fuzzy truth hedges

AuthorsEsteva, Francesc CSIC ORCID ; Godo, Lluis CSIC ORCID ; Noguera, Carles CSIC ORCID
KeywordsMathematical fuzzy logic
Truth hedges
Standard completeness
t-Norm based logics
Issue Date2013
PublisherElsevier
CitationInformation Sciences 232: 366- 385 (2013)
AbstractThe starting point of this paper are the works of Hájek and Vychodil on the axiomatization of truth-stressing and-depressing hedges as expansions of Hájek's BL logic by new unary connectives. They showed that their logics are chain-complete, but standard completeness was only proved for the expansions over Gödel 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. superdiagonal) 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. © 2013 Elsevier Inc. All rights reserved.
URIhttp://hdl.handle.net/10261/132598
DOI10.1016/j.ins.2012.12.010
Identifiersdoi: 10.1016/j.ins.2012.12.010
issn: 0020-0255
Appears in Collections:(IIIA) Artículos




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