718 search results - page 22 / 144 » Coloring quasi-line graphs |
88
Voted
JGT
2006
14 years 9 months ago
2006
An edge-colored graph H is properly colored if no two adjacent edges of H have the same color. In 1997, J. Bang-Jensen and G. Gutin conjectured that an edgecolored complete graph ...
92
Voted
COMBINATORICS
2006
14 years 9 months ago
2006
A homomorphism from an oriented graph G to an oriented graph H is a mapping from the set of vertices of G to the set of vertices of H such that -----(u)(v) is an arc in H whenever...
COMBINATORICS
2000
14 years 9 months ago
2000
A counterexample is presented to Gy. Elekes's conjecture concerning the existence of long 2-colored paths in properly colored graphs. A modified version of the conjecture is ...
AAIM
2005
Springer
15 years 3 months ago
2005
Springer
Let G be a undirected connected graph. Given a set of g groups each being a subset of V (G), tree routing and coloring is to produce g trees in G and assign a color to each of them...
JCT
2006
14 years 9 months ago
2006
Fix positive integers k , d , k, d such that k /d > k/d 2. If P is a set of vertices in a (k, d)-colorable graph G, and any two vertices of P are separated by distance at leas...