Proofs and Computations

ยท
ยท Cambridge University Press
ืกืคืจ ื“ื™ื’ื™ื˜ืœื™
480
ื“ืคื™ื
ื”ื‘ื™ืงื•ืจื•ืช ื•ื”ื“ื™ืจื•ื’ื™ื ืœื ืžืื•ืžืชื™ืย ืžื™ื“ืข ื ื•ืกืฃ

ืžื™ื“ืข ืขืœ ื”ืกืคืจ ื”ื“ื™ื’ื™ื˜ืœื™ ื”ื–ื”

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 Gรถdel's theorems. Part II studies and classifies provable recursion in classical systems, from fragments of Peano arithmetic up to ฮ 11โ€“CA0. Ordinal analysis and the (Schwichtenbergโ€“Wainer) subrecursive hierarchies play a central role and are used in proving the 'modified finite Ramsey' and 'extended Kruskal' independence results for PA and ฮ 11โ€“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.

ืขืœ ื”ืžื—ื‘ืจ

Helmut Schwichtenberg is an Emeritus Professor of Mathematics at Ludwig-Maximilians-Universitรคt Mรผnchen. He has recently developed the 'proof-assistant' MINLOG, a computer-implemented logic system for proof/program development and extraction of computational content.

Stanley S. Wainer is an Emeritus Professor of Mathematics at the University of Leeds and a past-President of the British Logic Colloquium.

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ืขื•ื“ ืžืืช Helmut Schwichtenbergโ€

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