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A weak completeness theorem for infinite valued first-order logic

Published online by Cambridge University Press:  12 March 2014

L. P. Belluce
Affiliation:
University of California, Los Angeles
C. C. Chang
Affiliation:
University of California, Los Angeles

Extract

This paper contains some results concerning the completeness of a first-order system of infinite valued logic

There are under consideration two distinct notions of completeness corresponding to the two notions of validity (see Definition 3) and strong validity (see Definition 4). Both notions of validity, whether based on the unit interval [0, 1] or based on linearly ordered MV-algebras, use the element 1 as the designated truth value. Originally, it was thought by many investigators in the field that one should be able to prove that the set of valid sentences is recursively enumerable. It was first proved by Rutledge in [9] that the set of valid sentences in the monadic first-order infinite valued logic is recursively enumerable.

Information

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 1964

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