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OverviewHyperarithmetic theory is the first step beyond classical recursion theory. It is the primary source of ideas and examples in higher recursion theory. It is also a crossroad for several areas of mathematical logic: in set theory it is an initial segment of Godel's L; in model theory, the least admissible set after ; in descriptive set theory, the setting for effective arguments. In this book, hyperarithmetic theory is developed at length and used to lift classical recursion theory from integers to recursive ordinals (metarecursion). Two further liftings are then made, first ordinals ( -recursion) and then to sets (E-recursion). Techniques such as finite and infinite injury, forcing and fine structure and extended and combined Dynamic and syntactical methods are contrasted. Several notions of reducibility and computation are compared. Post's problem is answere affirmatively in all three settings. This long-awaited volume of the -series will be a ""Must"" for all working in the field. Full Product DetailsAuthor: Gerald E. SacksPublisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG Imprint: Springer-Verlag Berlin and Heidelberg GmbH & Co. K Dimensions: Width: 23.40cm , Height: 2.00cm , Length: 15.60cm Weight: 0.691kg ISBN: 9783540193050ISBN 10: 3540193057 Pages: 359 Publication Date: 29 October 1990 Audience: College/higher education , Professional and scholarly , Undergraduate , Postgraduate, Research & Scholarly Format: Hardback Publisher's Status: Active Availability: Awaiting stock ![]() The supplier is currently out of stock of this item. It will be ordered for you and placed on backorder. Once it does come back in stock, we will ship it out for you. Table of ContentsContents: Hyperarithmetic Sets: Constructive Ordinals and Sets. The Hyperarithmetic Hierarchy. Predicates of Reals. Measure and Forcing.- Metarecursion: Metarecursive Enumerability. Hyperregularity and Priority.- -Recursion: Admissibility and Regularity. Priority Arguments. Splitting, Density and Beyond.- E-Recursion: E-closed Structures.- Forcing Computations to Converge.- Selection and k-Sections.- E-Recursively Enumerable Degrees.- Bibliography.- Subject Index.ReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |