nd an Eulerian walk in Figure 3. V5 V3 V6 V2 V1 Figure 3: Graph for Problem 3
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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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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