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» Problem Solving in the DISCO Constraint Database System
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B
2007
Springer
15 years 4 months ago
Time Constraint Patterns for Event B Development
Distributed applications are based on algorithms which should be able to deal with time constraints. It is mandatory to express time constraints in (mathematical) models and the cu...
Dominique Cansell, Dominique Méry, Joris Re...
TABLEAUX
1995
Springer
15 years 1 months ago
Constraint Model Elimination and a PTTP-Implementation
In constraint logic programming, proof procedures for Horn clauses are enhanced with an interface to efficient constraint solvers. In this paper we show how to incorporate constra...
Peter Baumgartner, Frieder Stolzenburg
PODS
2002
ACM
167views Database» more  PODS 2002»
15 years 10 months ago
OLAP Dimension Constraints
In multidimensional data models intended for online analytic processing (OLAP), data are viewed as points in a multidimensional space. Each dimension has structure, described by a...
Carlos A. Hurtado, Alberto O. Mendelzon
PODS
2007
ACM
159views Database» more  PODS 2007»
15 years 10 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...
COCO
2011
Springer
216views Algorithms» more  COCO 2011»
13 years 9 months ago
Linear Systems over Finite Abelian Groups
We consider a system of linear constraints over any finite Abelian group G of the following form: i(x1, . . . , xn) ≡ i,1x1 + · · · + i,nxn ∈ Ai for i = 1, . . . , t and e...
Arkadev Chattopadhyay, Shachar Lovett