117 search results - page 3 / 24 » Graphs with Chromatic Roots in the Interval (1, 2) |
CPC
2004
13 years 5 months ago
2004
This note presents two results on real zeros of chromatic polynomials. The first result states that if G is a graph containing a q-tree as a spanning subgraph, then the chromatic ...
CAGD
2007
13 years 5 months ago
2007
We present an algorithm which is able to compute all roots of a given univariate polynomial within a given interval. In each step, we use degree reduction to generate a strip boun...
WG
2005
Springer
13 years 11 months ago
2005
Springer
Abstract. In this paper we study the existence of a small set T of spanning trees that collectively “1-span” an interval graph G. In particular, for any pair of vertices u, v w...
ICALP
2007
Springer
13 years 12 months ago
2007
Springer
In this paper we consider the classical Erd˝os-R´enyi model of random graphs Gn,p. We show that for p = p(n) ≤ n−3/4−δ , for any fixed δ > 0, the chromatic number χ...
SWAT
1994
Springer
13 years 9 months ago
1994
Springer
Trapezoid graphs are a class of cocomparability graphs containing interval graphs and permutation graphs as subclasses. They were introduced by Dagan, Golumbic and Pinter DGP]. Th...