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4th Edition

Richard N. Aufmann + 3 others

Publisher: Cengage Learning

ISBN: 9781305965584

Chapter 5.3, Problem 13ES

Textbook Problem

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Show that the following graph contracts to

To determine

**To Prove:**

The given graph contracts to

**Given information:**

The graph is

**Proof:**

Let's prove the given graph contracts to

Naming the vertices of the given graph, we get

Choose a pair of adjacent outside edges and contract one of them.

If we contract AF, IJ, EH and BG, we get

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