Type Theory and Formal Proof

Type Theory and Formal Proof

Author: Rob Nederpelt

Publisher: Cambridge University Press

Published: 2014-11-06

Total Pages: 465

ISBN-13: 1316061086

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Type theory is a fast-evolving field at the crossroads of logic, computer science and mathematics. This gentle step-by-step introduction is ideal for graduate students and researchers who need to understand the ins and outs of the mathematical machinery, the role of logical rules therein, the essential contribution of definitions and the decisive nature of well-structured proofs. The authors begin with untyped lambda calculus and proceed to several fundamental type systems, including the well-known and powerful Calculus of Constructions. The book also covers the essence of proof checking and proof development, and the use of dependent type theory to formalise mathematics. The only prerequisite is a basic knowledge of undergraduate mathematics. Carefully chosen examples illustrate the theory throughout. Each chapter ends with a summary of the content, some historical context, suggestions for further reading and a selection of exercises to help readers familiarise themselves with the material.


Type Theory and Formal Proof

Type Theory and Formal Proof

Author: Rob Nederpelt

Publisher: Cambridge University Press

Published: 2014-11-06

Total Pages: 465

ISBN-13: 110703650X

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A gentle introduction for graduate students and researchers in the art of formalizing mathematics on the basis of type theory.


An Introduction to Mathematical Logic and Type Theory

An Introduction to Mathematical Logic and Type Theory

Author: Peter B. Andrews

Publisher: Springer Science & Business Media

Published: 2013-04-17

Total Pages: 404

ISBN-13: 9401599343

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In case you are considering to adopt this book for courses with over 50 students, please contact [email protected] for more information. This introduction to mathematical logic starts with propositional calculus and first-order logic. Topics covered include syntax, semantics, soundness, completeness, independence, normal forms, vertical paths through negation normal formulas, compactness, Smullyan's Unifying Principle, natural deduction, cut-elimination, semantic tableaux, Skolemization, Herbrand's Theorem, unification, duality, interpolation, and definability. The last three chapters of the book provide an introduction to type theory (higher-order logic). It is shown how various mathematical concepts can be formalized in this very expressive formal language. This expressive notation facilitates proofs of the classical incompleteness and undecidability theorems which are very elegant and easy to understand. The discussion of semantics makes clear the important distinction between standard and nonstandard models which is so important in understanding puzzling phenomena such as the incompleteness theorems and Skolem's Paradox about countable models of set theory. Some of the numerous exercises require giving formal proofs. A computer program called ETPS which is available from the web facilitates doing and checking such exercises. Audience: This volume will be of interest to mathematicians, computer scientists, and philosophers in universities, as well as to computer scientists in industry who wish to use higher-order logic for hardware and software specification and verification.


Structural Proof Theory

Structural Proof Theory

Author: Sara Negri

Publisher: Cambridge University Press

Published: 2008-07-10

Total Pages: 279

ISBN-13: 9780521068420

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A concise introduction to structural proof theory, a branch of logic studying the general structure of logical and mathematical proofs.


Programming in Martin-Löf's Type Theory

Programming in Martin-Löf's Type Theory

Author: Bengt Nordström

Publisher: Oxford University Press, USA

Published: 1990

Total Pages: 240

ISBN-13:

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In recent years, several formalisms for program construction have appeared. One such formalism is the type theory developed by Per Martin-Löf. Well suited as a theory for program construction, it makes possible the expression of both specifications and programs within the same formalism. Furthermore, the proof rules can be used to derive a correct program from a specification as well as to verify that a given program has a certain property. This book contains a thorough introduction to type theory, with information on polymorphic sets, subsets, monomorphic sets, and a full set of helpful examples.


Proofs and Computations

Proofs and Computations

Author: Helmut Schwichtenberg

Publisher: Cambridge University Press

Published: 2011-12-15

Total Pages: 480

ISBN-13: 1139504169

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Driven by the question, 'What is the computational content of a (formal) proof?', this book studies fundamental interactions between proof theory and computability. It provides a unique self-contained text for advanced students and researchers in mathematical logic and computer science. Part I covers basic proof theory, computability and Gödel's theorems. Part II studies and classifies provable recursion in classical systems, from fragments of Peano arithmetic up to Π11–CA0. Ordinal analysis and the (Schwichtenberg–Wainer) subrecursive hierarchies play a central role and are used in proving the 'modified finite Ramsey' and 'extended Kruskal' independence results for PA and Π11–CA0. Part III develops the theoretical underpinnings of the first author's proof assistant MINLOG. Three chapters cover higher-type computability via information systems, a constructive theory TCF of computable functionals, realizability, Dialectica interpretation, computationally significant quantifiers and connectives and polytime complexity in a two-sorted, higher-type arithmetic with linear logic.


Type Theory and Functional Programming

Type Theory and Functional Programming

Author: Simon Thompson

Publisher: Addison Wesley Publishing Company

Published: 1991

Total Pages: 396

ISBN-13:

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This book explores the role of Martin-Lof s constructive type theory in computer programming. The main focus of the book is how the theory can be successfully applied in practice. Introductory sections provide the necessary background in logic, lambda calculus and constructive mathematics, and exercises and chapter summaries are included to reinforce understanding.