3. [10 marks] Let Go = (V,E) and G₁ = (V,E₁) be two graphs on the same set of vertices. Let (V, EU E1), so that (u, v) is an edge of H if and only if (u, v) is an edge of Go or of G1 (or of both). H = (a) Show that if Go and G₁ are both Eulerian and En E₁ = Ø (i.e., Go and G₁ have no edges in common), then H is also Eulerian. (b) Give an example where Go and G₁ are both Eulerian, but H is not Eulerian.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.7: Applications
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3. [10 marks]
Let Go
=
(V,E) and G₁ = (V,E₁) be two graphs on the same set of vertices. Let
(V, EU E1), so that (u, v) is an edge of H if and only if (u, v) is an edge of Go
or of G1 (or of both).
H =
(a) Show that if Go and G₁ are both Eulerian and En E₁ = Ø (i.e., Go and G₁ have
no edges in common), then H is also Eulerian.
(b) Give an example where Go and G₁ are both Eulerian, but H is not Eulerian.
Transcribed Image Text:3. [10 marks] Let Go = (V,E) and G₁ = (V,E₁) be two graphs on the same set of vertices. Let (V, EU E1), so that (u, v) is an edge of H if and only if (u, v) is an edge of Go or of G1 (or of both). H = (a) Show that if Go and G₁ are both Eulerian and En E₁ = Ø (i.e., Go and G₁ have no edges in common), then H is also Eulerian. (b) Give an example where Go and G₁ are both Eulerian, but H is not Eulerian.
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