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JCT
2010
114views more  JCT 2010»
13 years 8 months ago
An almost quadratic bound on vertex Folkman numbers
The vertex Folkman number F(r, n, m), n < m, is the smallest integer t such that there exists a Km-free graph of order t with the property that every r-coloring of its vertices...
Andrzej Dudek, Vojtech Rödl
COMBINATORICA
2010
13 years 7 months ago
Online vertex-coloring games in random graphs
Consider the following one-player game. The vertices of a random graph on n vertices are revealed to the player one by one. In each step, also all edges connecting the newly reveal...
Martin Marciniszyn, Reto Spöhel
ORL
1998
116views more  ORL 1998»
13 years 9 months ago
Heuristic solution of the multisource Weber problem as a p-median problem
Good heuristic solutions for large Multisource Weber problems can be obtained by solving related p-median problems in which potential locations of the facilities are users location...
Pierre Hansen, Nenad Mladenovic, Éric D. Ta...
COR
2008
142views more  COR 2008»
13 years 9 months ago
Modeling and solving the rooted distance-constrained minimum spanning tree problem
In this paper we discuss models and methods for solving the rooted distance constrained minimum spanning tree problem which is defined as follows: given a graph G = (V, E) with no...
Luis Gouveia, Ana Paias, Dushyant Sharma
CP
2004
Springer
14 years 3 months ago
The Cardinality Matrix Constraint
Cardinality matrix problems are the underlying structure of several real world problems such as rostering, sports scheduling , and timetabling. These are hard computational problem...
Jean-Charles Régin, Carla P. Gomes