174 search results - page 33 / 35 » On the First-Fit Chromatic Number of Graphs |
JGT
2007
13 years 7 months ago
2007
We introduce and study backbone colorings, a variation on classical vertex colorings: Given a graph G = (V, E) and a spanning subgraph H of G (the backbone of G), a backbone color...
ICALP
2009
Springer
14 years 8 months ago
2009
Springer
We develop new structural results for apex-minor-free graphs and show their power by developing two new approximation algorithms. The first is an additive approximation for colorin...
COMBINATORICS
2007
13 years 7 months ago
2007
The distinguishing number ∆(X) of a graph X is the least positive integer n for which there exists a function f : V (X) → {0, 1, 2, · · · , n−1} such that no nonidentity ...
FOCS
2008
IEEE
14 years 2 months ago
2008
IEEE
The deletion–contraction algorithm is perhaps the most popular method for computing a host of fundamental graph invariants such as the chromatic, flow, and reliability polynomi...
DM
2008
13 years 7 months ago
2008
We construct an "orbital Tutte polynomial" associated with a dual pair M and M of matrices over a principal ideal domain R and a group G of automorphisms of the row spac...