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A new axiomatization for involutive monoidal t-norm-based logic. (English) Zbl 0998.03024
The paper gives an alternative axiomatization for the monoidal t-norm-based residuated logic originally introduced by F. Esteva and L. Godo [Fuzzy Sets Syst. 124, 271-288 (2001; Zbl 0994.03017)]. The presented approach stresses the geometric understanding of Girard monoids, especially the rotation invariance $$T(x,y)\leq z$$ iff $$T(y,N(z))\leq N(x)$$, where $$T$$ is a left-continuous triangular norm and $$N$$ is a strong negation. The rotation invariance is transformed into axiom schemata for logical calculi, and then serves as a substitute for the standard adjointness condition linking conjunction and implication connectives in t-norm-based residuated logics. The proposed new (and equivalent) axiomatization may give new interesting results in the recently introduced residuated fuzzy logic based on left-continuous t-norms.

##### MSC:
 03B52 Fuzzy logic; logic of vagueness
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##### References:
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