Title
The Brown--Colbourn conjecture on zeros of reliability polynomials is false
Abstract
We give counterexamples to the Brown-Colbourn conjecture on reliability polynomials, in both its univariate and multivariate forms. The multivariate Brown Colbourn conjecture is false already for the complete graph K4. The univariate Brown-Colbourn conjecture is false for certain simple planar graphs obtained from K4 by parallel and series expansion of edges. We show, in fact, that a graph has the multivariate Brown Colbourn property if and only if it is series parallel.
Year
DOI
Venue
2004
10.1016/j.jctb.2004.03.008
J. Comb. Theory, Ser. B
Keywords
Field
DocType
reliability polynomial,tutte polynomial,90b15,82b20,brown–colbourn conjecture,potts model.,94c15 (secondary),all-terminal reliability,brown-colbourn conjecture,multivariate form,90b18,05c99 (primary),05c40,68m10,univariate brown-colbourn conjecture,certain simple planar graph,68m15,potts model,series parallel,complete graph k4,90b25,68r10,series expansion,multivariate brown colbourn property,multivariate brown colbourn conjecture,complete graph,planar graph,statistical mechanics
Complete graph,Discrete mathematics,Combinatorics,Tutte polynomial,Counterexample,Univariate,Graph minor,Collatz conjecture,Planar graph,Mathematics,Graph coloring
Journal
Volume
Issue
ISSN
91
2
Journal of Combinatorial Theory, Series B
Citations 
PageRank 
References 
14
1.23
5
Authors
2
Name
Order
Citations
PageRank
Gordon Royle1395.05
Alan D. Sokal225322.25