nd an Eulerian walk in Figure 3. V5 V3 V6 V2 V1 Figure 3: Graph for Problem 3

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ISBN:9780470458365
Author:Erwin Kreyszig
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**Graph Theory Course: Eulerian Walks**

**Introduction to Eulerian Walks:**
An Eulerian walk (or Eulerian trail) is a trail in a graph that visits every edge exactly once. Determining whether a given graph has an Eulerian walk, and finding such a walk when it exists, are classic problems in graph theory.

**Problem Statement:**
Find an Eulerian walk in the graph depicted in Figure 3.

**Graph Description:**
The graph presented in Figure 3 consists of seven vertices, labeled \( v_1 \), \( v_2 \), \( v_3 \), \( v_4 \), \( v_5 \), \( v_6 \), and \( v_7 \), with edges connecting the vertices as follows:

- \( v_1 \) is connected to \( v_2 \), \( v_3 \), and \( v_4 \).
- \( v_2 \) is connected to \( v_1 \), \( v_3 \), \( v_4 \), and \( v_6 \).
- \( v_3 \) is connected to \( v_1 \), \( v_2 \), and \( v_5 \).
- \( v_4 \) is connected to \( v_1 \), \( v_2 \), \( v_5 \), and \( v_6 \).
- \( v_5 \) is connected to \( v_3 \), \( v_4 \), \( v_6 \), and \( v_7 \).
- \( v_6 \) is connected to \( v_2 \), \( v_4 \), \( v_5 \), and \( v_7 \).
- \( v_7 \) is connected to \( v_5 \) and \( v_6 \).

**Visual Representation:**
The graph in Figure 3 can be described as follows:
- **Vertices:** Represented by black dots labeled from \( v_1 \) to \( v_7 \).
- **Edges:** Connecting lines between the vertices demonstrating the relationships (edges) between them.

**Objective:**
The objective is to find a walk through the graph such that each edge is visited exactly once. This is the classic Eulerian walk problem.

**Analysis:**
To determine if an Eulerian walk exists in this graph, the following rules must be considered:
1. The graph must be connected
Transcribed Image Text:**Graph Theory Course: Eulerian Walks** **Introduction to Eulerian Walks:** An Eulerian walk (or Eulerian trail) is a trail in a graph that visits every edge exactly once. Determining whether a given graph has an Eulerian walk, and finding such a walk when it exists, are classic problems in graph theory. **Problem Statement:** Find an Eulerian walk in the graph depicted in Figure 3. **Graph Description:** The graph presented in Figure 3 consists of seven vertices, labeled \( v_1 \), \( v_2 \), \( v_3 \), \( v_4 \), \( v_5 \), \( v_6 \), and \( v_7 \), with edges connecting the vertices as follows: - \( v_1 \) is connected to \( v_2 \), \( v_3 \), and \( v_4 \). - \( v_2 \) is connected to \( v_1 \), \( v_3 \), \( v_4 \), and \( v_6 \). - \( v_3 \) is connected to \( v_1 \), \( v_2 \), and \( v_5 \). - \( v_4 \) is connected to \( v_1 \), \( v_2 \), \( v_5 \), and \( v_6 \). - \( v_5 \) is connected to \( v_3 \), \( v_4 \), \( v_6 \), and \( v_7 \). - \( v_6 \) is connected to \( v_2 \), \( v_4 \), \( v_5 \), and \( v_7 \). - \( v_7 \) is connected to \( v_5 \) and \( v_6 \). **Visual Representation:** The graph in Figure 3 can be described as follows: - **Vertices:** Represented by black dots labeled from \( v_1 \) to \( v_7 \). - **Edges:** Connecting lines between the vertices demonstrating the relationships (edges) between them. **Objective:** The objective is to find a walk through the graph such that each edge is visited exactly once. This is the classic Eulerian walk problem. **Analysis:** To determine if an Eulerian walk exists in this graph, the following rules must be considered: 1. The graph must be connected
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