65 search results - page 2 / 13 » Polynomial time approximation schemes for minimum disk cover... |
DAM
2006
13 years 4 months ago
2006
Subtree filament graphs are the intersection graphs of subtree filaments in a tree. This class of graphs contains subtree overlap graphs, interval filament graphs, chordal graphs,...
CCCG
2006
13 years 6 months ago
2006
We present a polynomial time algorithm for the unit disk covering problem with an approximation factor 72, and show that this is the best possible approximation factor based on th...
COCOON
2005
Springer
13 years 10 months ago
2005
Springer
In this paper, we study the following disc covering problem: Given a set of discs of various radii on the plane, find a subset of discs to maximize the area covered by exactly on...
SWAT
2010
Springer
13 years 10 months ago
2010
Springer
We consider the problem of partitioning the set of vertices of a given unit disk graph (UDG) into a minimum number of cliques. The problem is NP-hard and various constant factor a...
ISAAC
2000
Springer
13 years 8 months ago
2000
Springer
It has been a challenging open problem whether there is a polynomial time approximation algorithm for the Vertex Cover problem whose approximation ratio is bounded by a constant l...