35 search results - page 2 / 7 » Proof of a Chromatic Polynomial Conjecture |
JCT
2007
13 years 5 months ago
2007
Let P(G,t) and F(G,t) denote the chromatic and flow polynomials of a graph G. D.R. Woodall has shown that, if G is a plane triangulation, then the only zeros of P(G,t) in (−∞...
COCO
1995
Springer
13 years 9 months ago
1995
Springer
The instance complexity of a string x with respect to a set A and time bound t, ict (x : A), is the length of the shortest program for A that runs in time t, decides x correctly, ...
FOCS
1999
IEEE
13 years 9 months ago
1999
IEEE
This paper is concerned with the complexity of proofs and of searching for proofs in two propositional proof systems: Resolution and Polynomial Calculus (PC). For the former syste...
COMBINATORICS
2004
13 years 5 months ago
2004
A graph G is well-covered if every maximal independent set has the same cardinality. Let sk denote the number of independent sets of cardinality k, and define the independence pol...
TOMS
2010
13 years 3 months ago
2010
The Tutte polynomial of a graph, also known as the partition function of the q-state Potts model, is a 2-variable polynomial graph invariant of considerable importance in both comb...