Explanation Each 1 in the row i of the adjacency matrix corresponds to a directed edge from the vertex v i . Therefore, the number of 1s in row i is the number of edges from v i . The sum of the same is the out-degree of the vertex v i . Each 1 in the column j is corresponds to a directed edge from the vertex v i

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ISBN: 9780134689562

Author: Dossey, John A.

Publisher: Pearson,

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Chapter 4.5, Problem 79E

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To prove: The theorem that, “The sum of the entries in row i of the adjacency matrix of a directed graph equals the degree of the vertex vi, and the sum of entries in column j equals the in-degree of the vertex vj.”

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Chapter 4.5, Problem 78E

Chapter 4.5, Problem 80E

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Chapter 4 Solutions

Discrete Mathematics

Ch. 4.1 - In Exercises 1–4, list the set of edges and set of...Ch. 4.1 - Prob. 2E Ch. 4.1 - Prob. 3E Ch. 4.1 - Prob. 4E Ch. 4.1 - Prob. 5E Ch. 4.1 - In Exercises 5–8, draw a diagram representing the...Ch. 4.1 - Prob. 7E Ch. 4.1 - In Exercises 5–8, draw a diagram representing the...Ch. 4.1 - Prob. 9E Ch. 4.1 - In Exercises 9–14, determine whether a graph is...

Ch. 4.1 - Prob. 11E Ch. 4.1 - Prob. 12E Ch. 4.1 - Prob. 13E Ch. 4.1 - Prob. 14E Ch. 4.1 - Prob. 15E Ch. 4.1 - Prob. 16E Ch. 4.1 - Prob. 17E Ch. 4.1 - Draw the graph with ν = {1, 2, … , 10} as its set...Ch. 4.1 - Prob. 19E Ch. 4.1 - Prob. 20E Ch. 4.1 - Prob. 21E Ch. 4.1 - Show that there are an even number of vertices...Ch. 4.1 - Prob. 23E Ch. 4.1 - Prob. 24E Ch. 4.1 - Prob. 25E Ch. 4.1 - Prob. 26E Ch. 4.1 - Prob. 27E Ch. 4.1 - In Exercises 26–29, find the adjacency matrix and...Ch. 4.1 - Prob. 29E Ch. 4.1 - In Exercises 30 and 31, construct the graph for...Ch. 4.1 - Prob. 31E Ch. 4.1 - In Exercises 32 and 33, construct the graph for...Ch. 4.1 - Prob. 33E Ch. 4.1 - Prob. 34E Ch. 4.1 - Prob. 35E Ch. 4.1 - In Exercises 35-37, can each matrix be an...Ch. 4.1 - Prob. 37E Ch. 4.1 - Prob. 38E Ch. 4.1 - Prob. 39E Ch. 4.1 - Prob. 40E Ch. 4.1 - Prob. 41E Ch. 4.1 - Are the pairs of graphs in (a), (b), and (c)...Ch. 4.1 - Are the pairs of graphs in (a), (b), and (c)...Ch. 4.1 - Draw all the non isomorphic graphs with three...Ch. 4.1 - Prob. 45E Ch. 4.1 - Draw all the nonisomorphic graphs with five...Ch. 4.1 - Prob. 47E Ch. 4.1 - Prob. 48E Ch. 4.1 - Prob. 49E Ch. 4.1 - Suppose a graph has n vertices, each with degree...Ch. 4.1 - Prob. 51E Ch. 4.1 - Prob. 52E Ch. 4.1 - Suppose Mr. and Mrs. Lewis attended a bridge party...Ch. 4.1 - Prove that if a graph has at least two vertices,...Ch. 4.2 - In Exercises 1–4, determine whether the multigraph...Ch. 4.2 - Prob. 2E Ch. 4.2 - Prob. 3E Ch. 4.2 - Prob. 4E Ch. 4.2 - Prob. 5E Ch. 4.2 - Prob. 6E Ch. 4.2 - Prob. 7E Ch. 4.2 - Prob. 8E Ch. 4.2 - Prob. 9E Ch. 4.2 - In Exercises 9 and 10, perform the following...Ch. 4.2 - Prob. 11E Ch. 4.2 - Prob. 12E Ch. 4.2 - Prob. 13E Ch. 4.2 - Prob. 14E Ch. 4.2 - Prob. 15E Ch. 4.2 - Prob. 16E Ch. 4.2 - Prob. 17E Ch. 4.2 - In Exercises 18–23, determine whether the...Ch. 4.2 - Prob. 19E Ch. 4.2 - In Exercises 18–23, determine whether the...Ch. 4.2 - Prob. 21E Ch. 4.2 - In Exercises 18–23, determine whether the...Ch. 4.2 - Prob. 23E Ch. 4.2 - In Exercises 24–29, determine whether the...Ch. 4.2 - Prob. 25E Ch. 4.2 - Prob. 26E Ch. 4.2 - Prob. 27E Ch. 4.2 - Prob. 28E Ch. 4.2 - Prob. 29E Ch. 4.2 - Prob. 30E Ch. 4.2 - Prob. 31E Ch. 4.2 - Prob. 32E Ch. 4.2 - Prob. 33E Ch. 4.2 - Prob. 34E Ch. 4.2 - Prob. 35E Ch. 4.2 - Prob. 36E Ch. 4.2 - Prob. 37E Ch. 4.2 - An old childhood game asks children to trace a...Ch. 4.2 - Prob. 39E Ch. 4.2 - In 1859, Sir William Rowan Hamilton, a famous...Ch. 4.2 - Give examples of connected graphs satisfying each...Ch. 4.2 - Prob. 42E Ch. 4.2 - Prob. 43E Ch. 4.2 - Prob. 44E Ch. 4.2 - Prob. 45E Ch. 4.2 - Prob. 46E Ch. 4.2 - Prob. 47E Ch. 4.2 - Prob. 48E Ch. 4.2 - Prob. 49E Ch. 4.2 - Are the following two graphs isomorphic? 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To prove: The theorem that, “The sum of the entries in row i of the adjacency matrix of a directed graph equals the degree of the vertex v i , and the sum of entries in column j equals the in-degree of the vertex v j .”

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To prove: The theorem that, “The sum of the entries in row i of the adjacency matrix of a directed graph equals the degree of the vertex vi, and the sum of entries in column j equals the in-degree of the vertex vj.”

Want to see the full answer?

Chapter 4 Solutions