Chapter 8: Problem 12
Draw the graph with the given adjacency matrix.
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Chapter 8: Problem 12
Draw the graph with the given adjacency matrix.
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Determine if each complete bipartite graph \(K_{m, n}\) is Hamiltonian. If a graph is not Hamiltonian, does it contain a Hamiltonian path? $$K_{3,3}$$
Is the complete graph \(K_{n}\) regular? If so, find its degree.
Determine if each complete bipartite graph \(K_{m, n}\) is Hamiltonian. If a graph is not Hamiltonian, does it contain a Hamiltonian path? $$K_{3,4}$$
Let \(v_{1}, \ldots, v_{n}\) be n vertices with degrees \(\operatorname{deg}\left(v_{1}\right), \ldots, \operatorname{deg}\left(v_{n}\right),\) respectively, such that \(\sum_{i=1}^{n} \operatorname{deg}\left(v_{i}\right)\) is even. Prove that there exists a graph satisfying these conditions. [Hint: Let \(\sum_{i=1}^{n} \operatorname{deg}\left(v_{i}\right)=2 e .\) Use induction on e. \(]\)
Let \(G\) be the union of two simple disconnected subgraphs \(H_{1}\) and \(H_{2}\) with chromatic numbers \(m\) and \(n,\) respectively. What can you say about the chromatic number \(c\) of \(G ?\)
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