Prove that in any graph G with n vertices, n ≤ α(G)χ(G)
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.7: Applications
Problem 80EQ
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If G is a finite graph, the independence number α(G) is the maximum
number of pairwise nonadjacent vertices of G. The chromatic number χ(G)
of G is the minimum number of colors in a coloring of the vertices of G
with the property that no two adjacent vertices have the same color. Prove
that in any graph G with n vertices, n ≤ α(G)χ(G)
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