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Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193

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BuyFindarrow_forward

Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193
Textbook Problem
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  1. Let A = [ 1 1 2 1 0 1 2 1 0 ] . Find A2 and A3.
  2. Let G be the graph with vertices v1, v2, and v3 and with A as its adjacency matrix. Use the answers to part (a) to find the number of walks of length 2 from v1 to v3. Do not draw G to solve this problem.
  3. Examine the calculations you performed in answering part (a) to find five walks of length 2 from v3 to v3. Then draw G and find the walks by visual inspection.

To determine

(a)

Find A2 and A3.

Explanation

Given information:

Let A = [112101210]. 

Calculation:

We have A=[112101010].

The first matrix A has dimensions 2×2 and the second matrix A has dimension 2×2.

Since the inner dimensions are equal, we can multiply the matrices. Moreover, the product should be a 2×2 matrix.

Multiply the rows of the first matrix with the columns of the second matrix (adding the products of the corresponding elements):

A2=A=[ 1 1 2 1 0 1 2 1 0][ 1 1 2 1 0 1 2 1 0]

=[ 11+11+22 11+10+21 12+11+20 11+01+12 11+00+11 12+01+10 21+11+02 21+10+01 22+11+00]=[ 1+1+4 1+0+2 2+1+0 1+0+2 1+0+1 2+0+0 2+1+0 2+0+0 4+1+0]=[ 6 3 3 3 2 2 3 2 5]

The first matrix A2 has dimensions 2×2 and the second matrix A has dimension 2×2

To determine

(b)

Find the number of walks of length 2 from v1 to v3 and the number of walks of length 3 from v1 to v3. Do not draw G to solve the problem.

To determine

(c)

Examine the calculations you performed in answering part (a) to find five walks of length 2 from v3 to v3. Then draw G and find the walks by visual inspection.

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Sect-10.1 P-2ESSect-10.1 P-3ESSect-10.1 P-4ESSect-10.1 P-5ESSect-10.1 P-6ESSect-10.1 P-7ESSect-10.1 P-8ESSect-10.1 P-9ESSect-10.1 P-10ESSect-10.1 P-11ESSect-10.1 P-12ESSect-10.1 P-13ESSect-10.1 P-14ESSect-10.1 P-15ESSect-10.1 P-16ESSect-10.1 P-17ESSect-10.1 P-18ESSect-10.1 P-19ESSect-10.1 P-20ESSect-10.1 P-21ESSect-10.1 P-22ESSect-10.1 P-23ESSect-10.1 P-24ESSect-10.1 P-25ESSect-10.1 P-26ESSect-10.1 P-27ESSect-10.1 P-28ESSect-10.1 P-29ESSect-10.1 P-30ESSect-10.1 P-31ESSect-10.1 P-32ESSect-10.1 P-33ESSect-10.1 P-34ESSect-10.1 P-35ESSect-10.1 P-36ESSect-10.1 P-37ESSect-10.1 P-38ESSect-10.1 P-39ESSect-10.1 P-40ESSect-10.1 P-41ESSect-10.1 P-42ESSect-10.1 P-43ESSect-10.1 P-44ESSect-10.1 P-45ESSect-10.1 P-46ESSect-10.1 P-47ESSect-10.1 P-48ESSect-10.1 P-49ESSect-10.1 P-50ESSect-10.1 P-51ESSect-10.1 P-52ESSect-10.1 P-53ESSect-10.1 P-54ESSect-10.1 P-55ESSect-10.1 P-56ESSect-10.1 P-57ESSect-10.2 P-1TYSect-10.2 P-2TYSect-10.2 P-3TYSect-10.2 P-4TYSect-10.2 P-5TYSect-10.2 P-6TYSect-10.2 P-1ESSect-10.2 P-2ESSect-10.2 P-3ESSect-10.2 P-4ESSect-10.2 P-5ESSect-10.2 P-6ESSect-10.2 P-7ESSect-10.2 P-8ESSect-10.2 P-9ESSect-10.2 P-10ESSect-10.2 P-11ESSect-10.2 P-12ESSect-10.2 P-13ESSect-10.2 P-14ESSect-10.2 P-15ESSect-10.2 P-16ESSect-10.2 P-17ESSect-10.2 P-18ESSect-10.2 P-19ESSect-10.2 P-20ESSect-10.2 P-21ESSect-10.2 P-22ESSect-10.2 P-23ESSect-10.3 P-1TYSect-10.3 P-2TYSect-10.3 P-3TYSect-10.3 P-1ESSect-10.3 P-2ESSect-10.3 P-3ESSect-10.3 P-4ESSect-10.3 P-5ESSect-10.3 P-6ESSect-10.3 P-7ESSect-10.3 P-8ESSect-10.3 P-9ESSect-10.3 P-10ESSect-10.3 P-11ESSect-10.3 P-12ESSect-10.3 P-13ESSect-10.3 P-14ESSect-10.3 P-15ESSect-10.3 P-16ESSect-10.3 P-17ESSect-10.3 P-18ESSect-10.3 P-19ESSect-10.3 P-20ESSect-10.3 P-21ESSect-10.3 P-22ESSect-10.3 P-23ESSect-10.3 P-24ESSect-10.3 P-25ESSect-10.3 P-26ESSect-10.3 P-27ESSect-10.3 P-28ESSect-10.3 P-29ESSect-10.3 P-30ESSect-10.4 P-1TYSect-10.4 P-2TYSect-10.4 P-3TYSect-10.4 P-4TYSect-10.4 P-5TYSect-10.4 P-6TYSect-10.4 P-7TYSect-10.4 P-1ESSect-10.4 P-2ESSect-10.4 P-3ESSect-10.4 P-4ESSect-10.4 P-5ESSect-10.4 P-6ESSect-10.4 P-7ESSect-10.4 P-8ESSect-10.4 P-9ESSect-10.4 P-10ESSect-10.4 P-11ESSect-10.4 P-12ESSect-10.4 P-13ESSect-10.4 P-14ESSect-10.4 P-15ESSect-10.4 P-16ESSect-10.4 P-17ESSect-10.4 P-18ESSect-10.4 P-19ESSect-10.4 P-20ESSect-10.4 P-21ESSect-10.4 P-22ESSect-10.4 P-23ESSect-10.4 P-24ESSect-10.4 P-25ESSect-10.4 P-26ESSect-10.4 P-27ESSect-10.4 P-28ESSect-10.4 P-29ESSect-10.4 P-30ESSect-10.4 P-31ESSect-10.5 P-1TYSect-10.5 P-2TYSect-10.5 P-3TYSect-10.5 P-4TYSect-10.5 P-5TYSect-10.5 P-1ESSect-10.5 P-2ESSect-10.5 P-3ESSect-10.5 P-4ESSect-10.5 P-5ESSect-10.5 P-6ESSect-10.5 P-7ESSect-10.5 P-8ESSect-10.5 P-9ESSect-10.5 P-10ESSect-10.5 P-11ESSect-10.5 P-12ESSect-10.5 P-13ESSect-10.5 P-14ESSect-10.5 P-15ESSect-10.5 P-16ESSect-10.5 P-17ESSect-10.5 P-18ESSect-10.5 P-19ESSect-10.5 P-20ESSect-10.5 P-21ESSect-10.5 P-22ESSect-10.5 P-23ESSect-10.5 P-24ESSect-10.5 P-25ESSect-10.6 P-1TYSect-10.6 P-2TYSect-10.6 P-3TYSect-10.6 P-4TYSect-10.6 P-5TYSect-10.6 P-6TYSect-10.6 P-7TYSect-10.6 P-1ESSect-10.6 P-2ESSect-10.6 P-3ESSect-10.6 P-4ESSect-10.6 P-5ESSect-10.6 P-6ESSect-10.6 P-7ESSect-10.6 P-8ESSect-10.6 P-9ESSect-10.6 P-10ESSect-10.6 P-11ESSect-10.6 P-12ESSect-10.6 P-13ESSect-10.6 P-14ESSect-10.6 P-15ESSect-10.6 P-16ESSect-10.6 P-17ESSect-10.6 P-18ESSect-10.6 P-19ESSect-10.6 P-20ESSect-10.6 P-21ESSect-10.6 P-22ESSect-10.6 P-23ESSect-10.6 P-24ESSect-10.6 P-25ESSect-10.6 P-26ESSect-10.6 P-27ESSect-10.6 P-28ESSect-10.6 P-29ESSect-10.6 P-30ESSect-10.6 P-31ES