Studia Logica: An International Journal for Symbolic Logic, Vol. 103, No. 3 (June 2015), pp. 623-638 (16 pages) Within a weak system WKVS of intuitionistic analysis one may prove, using the Weak Fan ...
We first extend Quine's method of eliminating the bound variables to first-order predicate logic with operation symbols ; then we give a device for eliminating also the free variables ; and finally we ...
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