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MST
2008
124views more  MST 2008»
13 years 8 months ago
Complexity of Clausal Constraints Over Chains
We investigate the complexity of the satisfiability problem of constraints over finite totally ordered domains. In our context, a clausal constraint is a disjunction of inequaliti...
Nadia Creignou, Miki Hermann, Andrei A. Krokhin, G...
STOC
2009
ACM
172views Algorithms» more  STOC 2009»
14 years 9 months ago
Linear time approximation schemes for the Gale-Berlekamp game and related minimization problems
We design a linear time approximation scheme for the GaleBerlekamp Switching Game and generalize it to a wider class of dense fragile minimization problems including the Nearest C...
Marek Karpinski, Warren Schudy
CP
2006
Springer
14 years 13 days ago
: A Bottom-Up Approach for Solving Quantified CSPs
Abstract. Thanks to its extended expressiveness, the quantified constraint satisfaction problem (QCSP) can be used to model problems that are difficult to express in the standard C...
Guillaume Verger, Christian Bessière
GFKL
2005
Springer
95views Data Mining» more  GFKL 2005»
14 years 2 months ago
An Indicator for the Number of Clusters: Using a Linear Map to Simplex Structure
Abstract. The problem of clustering data can be formulated as a graph partitioning problem. In this setting, spectral methods for obtaining optimal solutions have received a lot of...
Marcus Weber, Wasinee Rungsarityotin, Alexander Sc...
ALT
2007
Springer
14 years 22 days ago
Cluster Identification in Nearest-Neighbor Graphs
Abstract. Assume we are given a sample of points from some underlying distribution which contains several distinct clusters. Our goal is to construct a neighborhood graph on the sa...
Markus Maier, Matthias Hein, Ulrike von Luxburg