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Completeness results for circumscription

✍ Scribed by Donald Perlis; Jack Minker


Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
727 KB
Volume
28
Category
Article
ISSN
0004-3702

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πŸ“œ SIMILAR VOLUMES


Circumscription: Completeness reviewed
✍ Manfred Jaeger πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 433 KB

In this paper we demonstrate that some results on the completeness of P-defining theories published earlier are incorrect. We point out that by restricting the original propositions to well-founded theories results somewhat weaker than the original ones can be retained. We also present a theorem tha

Completeness results for graph isomorphi
✍ Birgit Jenner; Johannes KΓΆbler; Pierre McKenzie; Jacobo TorΓ‘n πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 English βš– 239 KB

We prove that the graph isomorphism problem restricted to trees and to colored graphs with color multiplicities 2 and 3 is many-one complete for several complexity classes within NC 2 . In particular we show that tree isomorphism, when trees are encoded as strings, is NC 1 -hard under AC 0 -reductio

Completeness Results for Recursive Data
✍ Tirza Hirst; David Harel πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 767 KB

We consider infinite recursive (i.e., computable) relational data bases. Since the set of computable queries on such data bases is not closed under even simple relational operations, one must either make do with a very modest class of queries or considerably restrict the class of allowed data bases.

Some APX-completeness results for cubic
✍ Paola Alimonti; Viggo Kann πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 122 KB

Four fundamental graph problems, Minimum vertex cover, Maximum independent set, Minimum dominating set and Maximum cut, are shown to be APX-complete even for cubic graphs. Therefore, unless P = NP, these problems do not admit any polynomial time approximation scheme on input graphs of degree bounded