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 alge
Computable scenes and structures in films
β Scribed by Sundaram, H.; Shih-Fu Chang,
- Book ID
- 120170369
- Publisher
- IEEE
- Year
- 2002
- Tongue
- English
- Weight
- 373 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1520-9210
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Whenever a structure with a particularly interesting computability-theoretic property is found, it is natural to ask whether similar examples can be found within well-known classes of algebraic structures, such as groups, rings, lattices, and so forth. One way to give positive answers to this questi
## Abstract We investigate the computational complexity the class of Ξβcategorical computable structures. We show that hyperarithmetic categoricity is Ξ ^1^~1~βcomplete, while computable categoricity is Ξ ^0^~4~βhard. (Β© 2003 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)