(7) Graph Theory and Matrices. A graph G is shown at right. (a) What is the degree of each vertex of the graph? 3 deg(2) = 2 deg(5)= deg(1) = deg(4) = If you sum your six answers above, do you notice anything about the sum? 16 How many edges does the graph have? 8 deg(3) = 3 deg(6)= 3 (b) Write down the adjacency matrix A of G. es (c) What is the meaning of the (2,4)-entry of 4³ ? Support your answer with observations about the graph. Be very specific.
(7) Graph Theory and Matrices. A graph G is shown at right. (a) What is the degree of each vertex of the graph? 3 deg(2) = 2 deg(5)= deg(1) = deg(4) = If you sum your six answers above, do you notice anything about the sum? 16 How many edges does the graph have? 8 deg(3) = 3 deg(6)= 3 (b) Write down the adjacency matrix A of G. es (c) What is the meaning of the (2,4)-entry of 4³ ? Support your answer with observations about the graph. Be very specific.
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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Question
Transcribed Image Text:(7) Graph Theory and Matrices. A graph G is shown at right.
(a) What is the degree of each vertex of the graph?
3
deg(1) =
deg(4)
1
deg(2) =
deg(5) =
-4
2
8
(b) Write down the adjacency matrix A of G.
If you sum your six answers above, do you notice anything about the sum?
16
How many edges does the graph have?
deg(3) = 3
deg(6)= 3
G:
es
(c) What is the meaning of the (2,4)-entry of A³ ? Support your answer with observations about the graph. Be very specific.
(g) What would you expect to be the (3,4) entry of BTB ?
(d) What is the meaning of the (3,4)-entry of A4? Support your answer with observations about the graph. Be very specific.
(e) Write down the vertex-edge incidence matrix B, using the edge labels in the figure. What are the dimensions of matrix B?
(f) What would you expect to be the (3,4) entry of BBT?
What about the (3,6)-entry of BBT? In each case, why?
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