Sciweavers

74 search results - page 8 / 15
» On the Parameterized Complexity of Default Logic and Autoepi...
Sort
View
COCO
2003
Springer
114views Algorithms» more  COCO 2003»
15 years 3 months ago
Bounded Nondeterminism and Alternation in Parameterized Complexity Theory
We give machine characterisations and logical descriptions of a number of parameterized complexity classes. The focus of our attention is the class W[P], which we characterise as ...
Yijia Chen, Jörg Flum, Martin Grohe
96
Voted
ECCC
2008
79views more  ECCC 2008»
14 years 10 months ago
Valiant-Vazirani Lemmata for Various Logics
We show analogues of a theorem due to Valiant and Vazirani [16] for intractable parameterized complexity classes such as W[P], W[SAT] and the classes of the W-hierarchy as well as...
Moritz Müller
AGP
2003
IEEE
15 years 3 months ago
Enhancing Disjunctive Logic Programming for Ontology Specification
This paper is a presentation of ONTO-DLP, an extension of Disjunctive Logic Programming (DLP) for complex knowledge modelling. ONTO-DLP enhances DLP by constructs coming from othe...
Francesco Calimeri, Stefania Galizia, Massimo Ruff...
ICDT
1990
ACM
110views Database» more  ICDT 1990»
15 years 2 months ago
Beginnings of a Theory of General Database Completions
Ordinary logical implication is not enough for answering queries in a logic database, since especially negative information is only implicitly represented in the database state. M...
Stefan Brass
CORR
1999
Springer
95views Education» more  CORR 1999»
14 years 10 months ago
Fixed-parameter tractability, definability, and model checking
In this article, we study parameterized complexity theory from the perspective of logic, or more specifically, descriptive complexity theory. We propose to consider parameterized ...
Jörg Flum, Martin Grohe