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KR
2010
Springer
14 years 15 days ago
Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth Is not Enough
Cardinality constraints or, more generally, weight constraints are well recognized as an important extension of answer-set programming. Clearly, all common algorithmic tasks relat...
Reinhard Pichler, Stefan Rümmele, Stefan Szei...
ASP
2001
Springer
14 years 6 days ago
Useful Transformations in Answer set programming
We define a reduction system Ë¿ which preserves the stable semantics. This system includes two types of transformation rules. One type (which we call ˾) preserves the stable...
Mauricio Osorio, Juan Carlos Nieves, Chris Giannel...
LPAR
2001
Springer
14 years 4 days ago
Permutation Problems and Channelling Constraints
When writing a constraint program, we have to decide what to make the decision variable, and how to represent the constraints on these variables. In many cases, there is considerab...
Toby Walsh
GIS
1992
ACM
13 years 11 months ago
Using Orientation Information for Qualitative Spatial Reasoning
A new approach to representing qualitative spatial knowledge and to spatial reasoning is presented. This approach is motivated by cognitive considerations and is based on relative ...
Christian Freksa
ECTEL
2006
Springer
13 years 11 months ago
A Document Reuse Tool for Communities of Practice
With the rise of the Internet, virtual communities of practice are gaining importance as a mean of sharing and exchanging information. In such environments, information reuse is of...
Aida Boukottaya, Bernadette Charlier, Christine Va...