Elsevier

Fuzzy Sets and Systems

Volume 110, Issue 3, 16 March 2000, Pages 451-452
Fuzzy Sets and Systems

Short Communication
Comments on some versions of intuitionistic fuzzy propositional calculus due to K. Atanassov and G. Gargov

https://doi.org/10.1016/S0165-0114(99)00131-1Get rights and content

Abstract

We show that the versions of intuitionistic fuzzy propositional calculus given in Definitions 6 and 7 in Atanassov and Gargov (Fuzzy Sets and Systems 95 (1998) 39–52) do not satisfy modus ponens. Furthermore, we show that the version of intuitionistic fuzzy propositional calculus given in Definition 8 by Atanassov and Gargov is incorrect.

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