Example 2.1.3 Let's calculate the adjacency matrix for the graph from Example 1.7.1 drawn again. below....
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Example 2.1.3 Let's calculate the adjacency matrix for the graph from Example 1.7.1 drawn again. below. We consider the vertices in alphabetical order. Since there are edges between A and B, A and C, and A and E, in the first row for A we have a 1 in the 2nd, 3rd, and 5th column and Os elsewhere. B E D A B C D E ABCDE 011011 101 10 1 10 10 01100 10000 4. (a) Write the adjacency matrix for the complete graph K, and describe the general pattern for the adjacency matrix of K₁, for n 2 1. (b). Write the adjacency matrix for the complete bipartite graph K₁3 and describe the general pattern for the adjacency matrix of Km for n. m 2 1. 5. (a) Write the adjacency matrix for cycle C₁ and describe the general pattern for the adjacency matrix of C₁ for n 2 3. (b) Write the adjacency matrices for wheel W, and explain how to get the adjacency matrix of W₁, using the matrix for Cn. Hint: see how the matrix of W4 includes the matriz of C₁? A graph is regular if all of its vertices have the same degree. If a graph is regular with all vertices of degree r, we say the graph is r-regular. For example, the 4-cycle C4 is 2-regular whereas the complete graph K4 is 3-regular. 6. Which of these graphs are regular? Explain. Note: it might depend on n or m. (a) Cycle Cn (b) Path P (c) Complete Kn (d) Bipartite Km,n Example 2.1.3 Let's calculate the adjacency matrix for the graph from Example 1.7.1 drawn again. below. We consider the vertices in alphabetical order. Since there are edges between A and B, A and C, and A and E, in the first row for A we have a 1 in the 2nd, 3rd, and 5th column and Os elsewhere. B E D A B C D E ABCDE 011011 101 10 1 10 10 01100 10000 4. (a) Write the adjacency matrix for the complete graph K, and describe the general pattern for the adjacency matrix of K₁, for n 2 1. (b). Write the adjacency matrix for the complete bipartite graph K₁3 and describe the general pattern for the adjacency matrix of Km for n. m 2 1. 5. (a) Write the adjacency matrix for cycle C₁ and describe the general pattern for the adjacency matrix of C₁ for n 2 3. (b) Write the adjacency matrices for wheel W, and explain how to get the adjacency matrix of W₁, using the matrix for Cn. Hint: see how the matrix of W4 includes the matriz of C₁? A graph is regular if all of its vertices have the same degree. If a graph is regular with all vertices of degree r, we say the graph is r-regular. For example, the 4-cycle C4 is 2-regular whereas the complete graph K4 is 3-regular. 6. Which of these graphs are regular? Explain. Note: it might depend on n or m. (a) Cycle Cn (b) Path P (c) Complete Kn (d) Bipartite Km,n
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Microeconomics An Intuitive Approach with Calculus
ISBN: 978-0538453257
1st edition
Authors: Thomas Nechyba
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