Computable structures and the hyperarithmetical hierarchy

著者

• Ash, C. J.
• Knight, J.

書誌事項

Computable structures and the hyperarithmetical hierarchy

C.J. Ash, J. Knight

（Studies in logic and the foundations of mathematics, v. 144）

Elsevier Science, c2000

注記

Includes bibliographical references (p. 323-333) and index

内容説明・目次

内容説明

This book describes a program of research in computable structure theory. The goal is to find definability conditions corresponding to bounds on complexity which persist under isomorphism. The results apply to familiar kinds of structures (groups, fields, vector spaces, linear orderings Boolean algebras, Abelian p-groups, models of arithmetic). There are many interesting results already, but there are also many natural questions still to be answered. The book is self-contained in that it includes necessary background material from recursion theory (ordinal notations, the hyperarithmetical hierarchy) and model theory (infinitary formulas, consistency properties).

目次

Preface. Computability. The arithmetical hierarchy. Languages and structures. Ordinals. The hyperarithmetical hierarchy. Infinitary formulas. Computable infinitary formulas. The Barwise-Kreisel Compactness Theorem. Existence of computable structures. Completeness and forcing. The Ash-Nerode Theorem. Computable categoricity and stability. n-systems. -systems. Back-and forth relations. Theorems of Barker and Davey. Pairs of computable structures. Models of arithmetic. Special classes of structures.

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詳細情報

• NII書誌ID(NCID): BA47457546
• ISBN:
  • 0444500723
• 出版国コード: ne
• タイトル言語コード: eng
• 本文言語コード: eng
• 出版地: Amsterdam
• ページ数/冊数: xv, 346 p.
• 大きさ: 24 cm
• 親書誌ID:
  • BA00099329