Let G be the simple graph on the vertex set V(G) = {a, b, c, d, e, f} with adjacency matrix: 011101 101110 1 1 0 0 0 0 1 1 0 0 1 0 010100 A = 100000 where row 1 corresponds to vertex a, row 2 to vertex b, etc. Without drawing the graph G, use the adjacency matrix A to: (a) find the degree of each vertex of G. (b) find the number of edges in G. (c) explain why G has no 6-cycle. (d) find the number of paths in G of length 2, starting at vertex b. (e) find the number of walks of length 3 from vertex 6 to vertex a in G.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Q9
Question 9
Let G be the simple graph on the vertex set V(G) = {a, b, c, d, e, f} with
adjacency matrix:
011101
1
0 1 1
1 0
1 1 0 0 0 0
A =
1
1 0 0 1 0
0
1 0 1 0 0
1 0 0 0 0 0
where row 1 corresponds to vertex a, row 2 to vertex b, etc. Without drawing
the graph G, use the adjacency matrix A to:
(a) find the degree of each vertex of G.
(b) find the number of edges in G.
(c) explain why G has no 6-cycle.
(d) find the number of paths in G of length 2, starting at vertex b.
(e) find the number of walks of length 3 from vertex b to vertex a in G.
Transcribed Image Text:Question 9 Let G be the simple graph on the vertex set V(G) = {a, b, c, d, e, f} with adjacency matrix: 011101 1 0 1 1 1 0 1 1 0 0 0 0 A = 1 1 0 0 1 0 0 1 0 1 0 0 1 0 0 0 0 0 where row 1 corresponds to vertex a, row 2 to vertex b, etc. Without drawing the graph G, use the adjacency matrix A to: (a) find the degree of each vertex of G. (b) find the number of edges in G. (c) explain why G has no 6-cycle. (d) find the number of paths in G of length 2, starting at vertex b. (e) find the number of walks of length 3 from vertex b to vertex a in G.
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