Levels of implication and type free theories of classifications with approximation operator

Mathematical Logic Quarterly 38 (1):107-141 (1992)
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Abstract

We investigate a theory of Frege structures extended by the Myhill-Flagg hierarchy of implications. We study its relation to a property theory with an approximation operator and we give a proof theoretical analysis of the basic system involved. MSC: 03F35, 03D60

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Andrea Cantini
Università degli Studi di Firenze

Citations of this work

Fixed points in Peano arithmetic with ordinals.Gerhard Jäger - 1993 - Annals of Pure and Applied Logic 60 (2):119-132.

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References found in this work

The lambda calculus: its syntax and semantics.Hendrik Pieter Barendregt - 1981 - New York, N.Y.: Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co..
Proof theory.K. Schütte - 1977 - New York: Springer Verlag.
The Lambda Calculus. Its Syntax and Semantics.E. Engeler - 1984 - Journal of Symbolic Logic 49 (1):301-303.
Theory of Formal Systems.Raymond M. Smullyan - 1965 - Journal of Symbolic Logic 30 (1):88-90.

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