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OL
2010
140views more  OL 2010»
15 years 17 days ago
Approximation algorithms for finding and partitioning unit-disk graphs into co-k-plexes
This article studies a degree-bounded generalization of independent sets called co-k-plexes. Constant factor approximation algorithms are developed for the maximum co-k-plex probl...
Balabhaskar Balasundaram, Shyam Sundar Chandramoul...
152
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FOCS
1996
IEEE
15 years 10 months ago
Path Coloring on the Mesh
In the minimum path coloring problem, we are given a list of pairs of vertices of a graph. We are asked to connect each pair by a colored path. Paths of the same color must be edg...
Yuval Rabani
IJAMCIGI
2010
94views more  IJAMCIGI 2010»
15 years 19 days ago
A Study of Tabu Search for Coloring Random 3-Colorable Graphs Around the Phase Transition
We present an experimental investigation of tabu search (TS) to solve the 3-coloring problem (3-COL). Computational results reveal that a basic TS algorithm is able to find proper ...
Jean-Philippe Hamiez, Jin-Kao Hao, Fred W. Glover
JCT
2008
96views more  JCT 2008»
15 years 5 months ago
Graphs with full rank 3-color matrix and few 3-colorings
We exhibit a a counterexample to a conjecture of Thomassen stating that the number of distinct 3-colorings of every graph whose 3color matrix has full column rank is superpolynomi...
Serguei Norine, Jean-Sébastien Sereni
DMTCS
2011
261views Mathematics» more  DMTCS 2011»
14 years 5 months ago
An expected polynomial time algorithm for coloring 2-colorable 3-graphs
Abstract. We present an algorithm that for 2-colorable 3-uniform hypergraphs, finds a 2-coloring in average running time O(n5 log2 n).
Yury Person, Mathias Schacht