13. Let G = (V, E) be an undirected connected loop-free planar graph. Suppose G determines53 regions. If, for some planar embedding of G, each region has at least five edges in its boundary,prove that |V | > 81.
13. Let G = (V, E) be an undirected connected loop-free planar graph. Suppose G determines53 regions. If, for some planar embedding of G, each region has at least five edges in its boundary,prove that |V | > 81.
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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13. Let G = (V, E) be an undirected connected loop-free planar graph. Suppose G determines
53 regions. If, for some planar embedding of G, each region has at least five edges in its boundary,
prove that |V | > 81.
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