Title
Proofs and Computations (Perspectives in Logic),Used
Delivery time: 8-12 business days (International)
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 selfcontained text for advanced students and researchers in mathematical logic and computer science. Part I covers basic proof theory, computability and Gdel's theorems. Part II studies and classifies provable recursion in classical systems, from fragments of Peano arithmetic up to ?11CA0. Ordinal analysis and the (SchwichtenbergWainer) subrecursive hierarchies play a central role and are used in proving the 'modified finite Ramsey' and 'extended Kruskal' independence results for PA and ?11CA0. Part III develops the theoretical underpinnings of the first author's proof assistant MINLOG. Three chapters cover highertype computability via information systems, a constructive theory TCF of computable functionals, realizability, Dialectica interpretation, computationally significant quantifiers and connectives and polytime complexity in a twosorted, highertype arithmetic with linear logic.
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