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CONSTRAINTS
1999
105views more  CONSTRAINTS 1999»
13 years 8 months ago
Algorithmic Power from Declarative Use of Redundant Constraints
Interval constraints can be used to solve problems in numerical analysis. In this paper we show that one can improve the performance of such an interval constraint program by the ...
Maarten H. van Emden
GD
2005
Springer
14 years 1 months ago
A Mixed-Integer Program for Drawing High-Quality Metro Maps
In this paper we investigate the problem of drawing metro maps which is defined as follows. Given a planar graph G of maximum degree 8 with its embedding and vertex locations (e.g...
Martin Nöllenburg, Alexander Wolff
CONSTRAINTS
2006
115views more  CONSTRAINTS 2006»
13 years 8 months ago
A Cost-Regular Based Hybrid Column Generation Approach
Abstract. Constraint Programming (CP) offers a rich modeling language of constraints embedding efficient algorithms to handle complex and heterogeneous combinatorial problems. To s...
Sophie Demassey, Gilles Pesant, Louis-Martin Rouss...
DAGSTUHL
2007
13 years 10 months ago
Graph matching with type constraints on nodes and edges
Abstract. In this paper, we consider two particular problems of directed graph matching. The first problem concerns graphs with nodes that have been subdivided into classes of di...
Catherine Fraikin, Paul Van Dooren
GG
2004
Springer
14 years 1 months ago
Towards Graph Programs for Graph Algorithms
Abstract. Graph programs as introduced by Habel and Plump [8] provide a simple yet computationally complete language for computing functions and relations on graphs. We extend this...
Detlef Plump, Sandra Steinert