• Publications
  • Influence
The DLV system for knowledge representation and reasoning
TLDR
The experimental results confirm the solidity of DLV and highlight its potential for emerging application areas like knowledge management and information integration, and the main international projects investigating the potential of the system for industrial exploitation are described. Expand
Answer set programming at a glance
The motivation and key concepts behind answer set programming---a promising approach to declarative problem solving.
Combining answer set programming with description logics for the Semantic Web
TLDR
A precise picture of the complexity of deciding strong and weak answer set existence for a dl-program is given, and the (unique) minimal Herbrand model semantics of positive and stratified dL-programs are generalized. Expand
Computing Discrete Fréchet Distance ∗
The Fréchet distance between two curves in a metric space is a measure of the similarity between the curves. We present a discrete variation of this measure. It provides good approximations of theExpand
Complexity and expressive power of logic programming
TLDR
This article surveys various complexity and expressiveness results on different forms of logic programming, in particular, propositional logic programming and datalog, but it also mentions general logic programming with function symbols. Expand
On the computational cost of disjunctive logic programming: Propositional case
  • Thomas Eiter, G. Gottlob
  • Computer Science, Mathematics
  • Annals of Mathematics and Artificial Intelligence
  • 1 September 1995
TLDR
This paper shows that the consistency check is Σ2p-complete for the disjunctive stable model semantics, the iterated closed world assumption, and the perfect model semantics; analogous results are derived for the answer sets semantics of extendeddisjunctive logic programs. Expand
Equilibria in Heterogeneous Nonmonotonic Multi-Context Systems
TLDR
A general framework for multi-context reasoning which allows us to combine arbitrary monotonic and nonmonotonic logics and investigates several notions of equilibrium representing acceptable belief states for the authors' multi- context systems. Expand
On the complexity of propositional knowledge base revision, updates, and counterfactuals
TLDR
The complexity of several recently proposed methods for updating or revising propositional knowledge bases is studied to derive complexity results for the following problem: given a knowledge base T, an update p, and a formula q, decide whether q is derivable from Top. Expand
Identifying the Minimal Transversals of a Hypergraph and Related Problems
TLDR
Two decision problems on hypergraphs, hypergraph saturation and recognition of the transversal hypergraph, are considered and their significance for several search problems in applied computer science is discussed. Expand
Preferred Answer Sets for Extended Logic Programs
TLDR
This paper addresses the issue of how Gelfond and Lifschitz's answer set semantics for extended logic programs can be suitably modified to handle prioritized programs, and defines a strong and a weak notion of preferred answer sets. Expand
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