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Three Complexity Problems in Quantified Fuzzy Logic
Studia Logica: An International Journal for Symbolic Logic
Vol. 68, No. 1, Methods for Investigating Self-Referential Truth (Jun., 2001), pp. 143-152
Published by: Springer
Stable URL: http://www.jstor.org/stable/20016302
Page Count: 10
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We prove that the sets of standard tautologies of predicate Product Logic and of predicate Basic Logic, as well as the set of standard-satisfiable formulas of predicate Basic Logic are not arithmetical, thus finding a rather satisfactory solution to three problems proposed by Hájek in [H01].
Studia Logica: An International Journal for Symbolic Logic © 2001 Springer