Answer the following questions: a.Suppose that a connected bipartite planar simple graph has e edges and v vertices. Show that e ≤ 2v − 4 if v ≥ 3.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter9: Systems Of Linear Equations
Section9.5: Multiplication With The Addition-or-subtraction Method
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Answer the following questions:

a.Suppose that a connected bipartite planar simple graph has e edges and v vertices. Show that e ≤ 2v − 4
if v ≥ 3.

b. Let G be a graph with n − 1 edges. Show that the following three statements are equivalent:
(i) G is connected
(ii) G is acyclic;
(iii) G is a tree.

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