51 search results - page 3 / 11 » Improved upper bounds for vertex cover |
DCOSS
2008
Springer
13 years 9 months ago
2008
Springer
We present the first local approximation schemes for maximum independent set and minimum vertex cover in unit disk graphs. In the graph model we assume that each node knows its geo...
ESA
2010
Springer
13 years 8 months ago
2010
Springer
Abstract. Possibly the most famous algorithmic meta-theorem is Courcelle's theorem, which states that all MSO-expressible graph properties are decidable in linear time for gra...
ISAAC
2000
Springer
13 years 11 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...
DM
2008
13 years 7 months ago
2008
Consider a configuration of pebbles distributed on the vertices of a connected graph of order n. A pebbling step consists of removing two pebbles from a given vertex and placing o...
JGT
2007
13 years 7 months ago
2007
A cyclic colouring of a plane graph is a vertex colouring such that vertices incident with the same face have distinct colours. The minimum number of colours in a cyclic colouring...