65 search results - page 3 / 13 » Finding maximum degrees in hidden bipartite graphs |
SODA
2010
ACM
14 years 7 months ago
2010
ACM
Finding the largest independent set in a graph is a notoriously difficult NP-complete combinatorial optimization problem. Moreover, even for graphs with largest degree 3, no polyn...
ISAAC
2004
Springer
14 years 3 months ago
2004
Springer
We study complexity and approximation of min weighted node coloring in planar, bipartite and split graphs. We show that this problem is NP-complete in planar graphs, even if they a...
COLOGNETWENTE
2009
13 years 11 months ago
2009
Given a graph G = (V, E), a proper vertex colouring of V is t-frugal if no colour appears more than t times in any neighbourhood and is acyclic if each of the bipartite graphs con...
COMGEO
2007
ACM
13 years 9 months ago
2007
ACM
The slope-number of a graph G is the minimum number of distinct edge slopes in a straight-line drawing of G in the plane. We prove that for Δ 5 and all large n, there is a Δ-reg...
WAOA
2007
Springer
14 years 3 months ago
2007
Springer
For a connected graph G, let L(G) denote the maximum number of leaves in a spanning tree in G. The problem of computing L(G) is known to be NP-hard even for cubic graphs. We improv...