Title
An Extremal Property of Turán Graphs.
Abstract
Let F-n,F-tr(n) denote the family of all graphs on n vertices and t(r)(n) edges, where t(r)(n) is the number of edges in the Turan's graph T-r(n) the complete r-partite graph on n vertices with partition sizes as equal as possible. For a graph G and a positive integer lambda, let P-G(lambda) denote the number of proper vertex colorings of G with at most lambda colors, and let f(n,t(r)(n), lambda) = max{P-G(lambda) : G is an element of F-n,F-tr(n)}. We prove that for all n >= r >= 2, f(n, t(r)(n), r+1) = P-Tr(n)(r+1) and that T-r(n) is the only extremal graph.
Year
Venue
Field
2010
ELECTRONIC JOURNAL OF COMBINATORICS
Integer,Discrete mathematics,Graph,Combinatorics,Vertex (geometry),Partition (number theory),Mathematics,Lambda
DocType
Volume
Issue
Journal
17
1.0
ISSN
Citations 
PageRank 
1077-8926
2
0.42
References 
Authors
5
2
Name
Order
Citations
PageRank
Felix Lazebnik135349.26
Spencer Tofts250.84