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Natural Deduction: A Proof-Theoretical Study

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Natural Deduction: A Proof-Theoretical Study Cover

 

Synopses & Reviews

Publisher Comments:

An innovative approach to the semantics of logic, proof-theoretic semantics seeks the meaning of propositions and logical connectives within a system of inference. Gerhard Gentzen invented proof-theoretic semantics in the early 1930s, and Dag Prawitz, the author of this study, extended its analytic proofs to systems of natural deduction. Prawitz's theories form the basis of intuitionistic type theory, and his inversion principle constitutes the foundation of most modern accounts of proof-theoretic semantics.

The concept of natural deduction follows a truly natural progression, establishing the relationship between a noteworthy systematization and the interpretation of logical signs. As this survey explains, the deduction's principles allow it to proceed in a direct fashion — a manner that permits every natural deduction's transformation into the equivalent of normal form theorem. A basic result in proof theory, the normal form theorem was established by Gentzen for the calculi of sequents. The proof of this result for systems of natural deduction is in many ways simpler and more illuminating than alternative methods. This study offers clear illustrations of the proof and numerous examples of its advantages.

Synopsis:

Prawitz's theories form the basis of intuitionistic type theory, and his inversion principle constitutes the foundation of most modern accounts of proof-theoretic semantics. The proof-theoretical system represents a simpler and more illuminating method than alternative approaches, and this volume offers a succinct, coherent illustration of its applications to natural deduction. 1965 edition.

Synopsis:

This volume examines the notion of an analytic proof as a natural deduction, suggesting that the proof's value may be understood as its normal form--a concept with significant implications to proof-theoretic semantics.

Table of Contents

1. Natural Deduction of Gentzen-Type

2. The Inversion Principle

3. Normal Deductions in Classical Logic

4. Normal Deductions in Intuitionistic Logic

5. Second Order Logic

6. Modal Logic

7. Some Other Concepts of Implication

Appendix A. The Calculi of Sequents

Appendix B. On a set theory by Fitch

Appendix C. Notes on some other variants of natural deduction

Bibliographical References

Index

Index of Symbols

Product Details

ISBN:
9780486446554
Author:
Prawitz, Dag
Publisher:
Dover Publications
Author:
Mathematics
Subject:
General
Subject:
Logic
Subject:
Logic, symbolic and mathematical
Subject:
General Mathematics
Subject:
Mathematics - General
Edition Description:
Trade Paper
Series:
Dover Books on Mathematics
Publication Date:
20060231
Binding:
TRADE PAPER
Language:
English
Illustrations:
Y
Pages:
126
Dimensions:
8.5 x 5.38 in 0.38 lb

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Product details 126 pages Dover Publications - English 9780486446554 Reviews:
"Synopsis" by ,
Prawitz's theories form the basis of intuitionistic type theory, and his inversion principle constitutes the foundation of most modern accounts of proof-theoretic semantics. The proof-theoretical system represents a simpler and more illuminating method than alternative approaches, and this volume offers a succinct, coherent illustration of its applications to natural deduction. 1965 edition.

"Synopsis" by ,
This volume examines the notion of an analytic proof as a natural deduction, suggesting that the proof's value may be understood as its normal form--a concept with significant implications to proof-theoretic semantics.

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