
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Question
Consider the following graph.
(b) How many trails are there from a to c?
(c) How many walks are there from a to c?

Transcribed Image Text:**Graph Description:**
The graph consists of three vertices labeled \(a\), \(b\), and \(c\). There are five edges, labeled \(e_1\) through \(e_5\). The edges connect the vertices as follows:
- \(e_1\), \(e_2\), and \(e_3\) connect vertices \(a\) and \(b\).
- \(e_4\) forms a loop at vertex \(b\).
- \(e_5\) connects vertices \(b\) and \(c\).
**Questions and Answers:**
(a) How many paths are there from \(a\) to \(c\)?
- Answer: 4 ✔️
(b) How many trails are there from \(a\) to \(c\)?
- Answer: 4 ❌
(c) How many walks are there from \(a\) to \(c\)?
- Answer: There are potentially many walks, but the space is incomplete (indicated with ❌).
**Explanation:**
- **Paths** refer to sequences of edges that connect two vertices without repeating any vertices.
- **Trails** refer to sequences where vertices can repeat, but edges cannot.
- **Walks** allow both edges and vertices to be repeated.
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