Discrete Mathematics With Applications
5th Edition
ISBN: 9781337694193
Author: EPP, Susanna S.
Publisher: Cengage Learning,
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Textbook Question
Chapter 10.1, Problem 43ES
a. Prove that if a walk in a graph contains a repeated edge, then the walk contains a repeated vertex.
b. Explain how it follows from part (a) that any walk with no repeated vertex has no repeated edge.
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Give an example of a graph with at least 3 vertices that has exactly 2 automorphisms(one of which is necessarily the identity automorphism). Prove that your example iscorrect.
3. [10 marks]
Let Go (Vo, Eo) and G₁
=
(V1, E1) be two graphs that
⚫ have at least 2 vertices each,
⚫are disjoint (i.e., Von V₁ = 0),
⚫ and are both Eulerian.
Consider connecting Go and G₁ by adding a set of new edges F, where each new edge
has one end in Vo and the other end in V₁.
(a) Is it possible to add a set of edges F of the form (x, y) with x € Vo and y = V₁ so
that the resulting graph (VUV₁, Eo UE₁ UF) is Eulerian?
(b) If so, what is the size of the smallest possible F?
Prove that your answers are correct.
Let T be a tree. Prove that if T has a vertex of degree k, then T has at least k leaves.
Chapter 10 Solutions
Discrete Mathematics With Applications
Ch. 10.1 - Let G be a graph and let v and w be vertices in G....Ch. 10.1 - A graph is connected if, any only if, _____.Ch. 10.1 - Removing an edge from a circuit in a graph does...Ch. 10.1 - An Euler circuit in graph is _____.Ch. 10.1 - Prob. 5TYCh. 10.1 - Prob. 6TYCh. 10.1 - Prob. 7TYCh. 10.1 - If a graph G has a Hamiltonian circuit, then G has...Ch. 10.1 - A travelling salesman problem involves finding a...Ch. 10.1 - In the graph below, determine whether the...
Ch. 10.1 - In the graph below, determine whether the...Ch. 10.1 - Let G be the graph and consider the walk...Ch. 10.1 - Consider the following graph. How many paths are...Ch. 10.1 - Consider the following graph. How many paths are...Ch. 10.1 - An edge whose removal disconnects the graph of...Ch. 10.1 - Given any positive integer n, (a) find a connected...Ch. 10.1 - Find the number of connected components for each...Ch. 10.1 - Each of (a)—(c) describes a graph. In each case...Ch. 10.1 - Prob. 10ESCh. 10.1 - Is it possible for a citizen of Königsberg to make...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Determine which of the graph in 12-17 have Euler...Ch. 10.1 - Is it possible to take a walk around the city...Ch. 10.1 - For each of the graph in 19-21, determine whether...Ch. 10.1 - Prob. 20ESCh. 10.1 - Prob. 21ESCh. 10.1 - Prob. 22ESCh. 10.1 - Prob. 23ESCh. 10.1 - Find the complement of each of the following...Ch. 10.1 - Find the complement of the graph K4, the complete...Ch. 10.1 - Suppose that in a group of five people A,B,C,D,...Ch. 10.1 - Prob. 27ESCh. 10.1 - Show that at a party with at least two people,...Ch. 10.1 - Find Hamiltonian circuits for each of the graph in...Ch. 10.1 - Find Hamiltonian circuits for each of the graph in...Ch. 10.1 - Prob. 31ESCh. 10.1 - Show that none of graphs in 31-33 has a...Ch. 10.1 - Prob. 33ESCh. 10.1 - Prob. 34ESCh. 10.1 - Prob. 35ESCh. 10.1 - In 34-37, find Hamiltonian circuits for those...Ch. 10.1 - Prob. 37ESCh. 10.1 - Give two examples of graphs that have Euler...Ch. 10.1 - Prob. 39ESCh. 10.1 - Prob. 40ESCh. 10.1 - Give two examples of graphs that have Euler...Ch. 10.1 - A traveler in Europe wants to visit each of the...Ch. 10.1 - a. Prove that if a walk in a graph contains a...Ch. 10.1 - Prob. 44ESCh. 10.1 - Prob. 45ESCh. 10.1 - Prob. 46ESCh. 10.1 - Prove that if there is a trail in a graph G from a...Ch. 10.1 - If a graph contains a circuits that starts and...Ch. 10.1 - Prob. 49ESCh. 10.1 - Let G be a connected graph, and let C be any...Ch. 10.1 - Prob. 51ESCh. 10.1 - Prob. 52ESCh. 10.1 - For what values of n dies the complete graph Kn...Ch. 10.1 - For what values of m and n does the complete...Ch. 10.1 - What is the maximum number of edges a simple...Ch. 10.1 - Prob. 56ESCh. 10.1 - Prob. 57ESCh. 10.2 - In the adjacency matrix for a directed graph, the...Ch. 10.2 - Prob. 2TYCh. 10.2 - Prob. 3TYCh. 10.2 - Prob. 4TYCh. 10.2 - Prob. 5TYCh. 10.2 - Prob. 6TYCh. 10.2 - Find real numbers a, b, and c such that the...Ch. 10.2 - Find the adjacency matrices for the following...Ch. 10.2 - Find directed graphs that have the following...Ch. 10.2 - Find adjacency matrices for the following...Ch. 10.2 - Find graphs that have the following adjacency...Ch. 10.2 - Prob. 6ESCh. 10.2 - Prob. 7ESCh. 10.2 - Prob. 8ESCh. 10.2 - Prob. 9ESCh. 10.2 - Prob. 10ESCh. 10.2 - Prob. 11ESCh. 10.2 - Prob. 12ESCh. 10.2 - Let O denote the matrix [0000] . Find 2 × 2...Ch. 10.2 - Prob. 14ESCh. 10.2 - Prob. 15ESCh. 10.2 - In 14-18, assume the entries of all matrices are...Ch. 10.2 - Prob. 17ESCh. 10.2 - Prob. 18ESCh. 10.2 - Prob. 19ESCh. 10.2 - The following is an adjacency matrix for a graph:...Ch. 10.2 - Let A be the adjacency matrix for K3, the complete...Ch. 10.2 - Draw a graph that has [0001200011000211120021100]...Ch. 10.2 - Prob. 23ESCh. 10.3 - If G and G’ are graphs, then G is isomorphic to G’...Ch. 10.3 - A property P is an invariant for graph isomorphism...Ch. 10.3 - Prob. 3TYCh. 10.3 - For each pair of graphs G and G’ in 1-5, determine...Ch. 10.3 - For each pair of graphs G and G’ in 1-5, determine...Ch. 10.3 - For each pair of graphs G and G’ in 1-5, determine...Ch. 10.3 - For each pair of graphs G and G’ in 1-5, determine...Ch. 10.3 - For each pair of graphs G and G in 1—5, determine...Ch. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - Prob. 9ESCh. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - For each pair of simple graphs G and G in 6—13,...Ch. 10.3 - For each pair of graphs G and G’ in 6-13,...Ch. 10.3 - Draw all nonisomorphic simple graphs with three...Ch. 10.3 - Draw all nonisomorphic simple graphs with four...Ch. 10.3 - Prob. 16ESCh. 10.3 - Draw all nonisomorphic graphs with four vertices...Ch. 10.3 - Draw all nonisomorphic graphs with four vertices...Ch. 10.3 - Prob. 19ESCh. 10.3 - Draw four nonisomorphic graphs with six vertices,...Ch. 10.3 - Prob. 21ESCh. 10.3 - Prove that each of the properties in 21-29 is an...Ch. 10.3 - Prob. 23ESCh. 10.3 - Prove that each of the properties in 21-29 is an...Ch. 10.3 - Prob. 25ESCh. 10.3 - Prob. 26ESCh. 10.3 - Prob. 27ESCh. 10.3 - Prove that each of the properties in 21-29 is an...Ch. 10.3 - Prob. 29ESCh. 10.3 - Show that the following two graphs are not...Ch. 10.4 - A circuit-free graph is a graph with __________.Ch. 10.4 - Prob. 2TYCh. 10.4 - Prob. 3TYCh. 10.4 - Prob. 4TYCh. 10.4 - Prob. 5TYCh. 10.4 - Prob. 6TYCh. 10.4 - For any positive integer n, if G is a connected...Ch. 10.4 - Read the tree in Example 10.4.2 from left to right...Ch. 10.4 - Prob. 2ESCh. 10.4 - Prob. 3ESCh. 10.4 - Prob. 4ESCh. 10.4 - Prob. 5ESCh. 10.4 - Prob. 6ESCh. 10.4 - Prob. 7ESCh. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - Prob. 14ESCh. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - Prob. 17ESCh. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - In each of 8—21, either draw a graph with the...Ch. 10.4 - A connected graph has twelve vertices and eleven...Ch. 10.4 - A connected graph has nine vertices and twelve...Ch. 10.4 - Prob. 24ESCh. 10.4 - Prob. 25ESCh. 10.4 - If a graph has n vertices and n2 or fewer can it...Ch. 10.4 - A circuit-free graph has ten vertices and nine...Ch. 10.4 - Is a circuit-free graph with n vertices and at...Ch. 10.4 - Prob. 29ESCh. 10.4 - Prob. 30ESCh. 10.4 - a. Prove that the following is an invariant for...Ch. 10.5 - Prob. 1TYCh. 10.5 - Prob. 2TYCh. 10.5 - Prob. 3TYCh. 10.5 - Prob. 4TYCh. 10.5 - Prob. 5TYCh. 10.5 - Prob. 1ESCh. 10.5 - Prob. 2ESCh. 10.5 - Draw binary trees to represent the following...Ch. 10.5 - Prob. 4ESCh. 10.5 - Prob. 5ESCh. 10.5 - Prob. 6ESCh. 10.5 - Prob. 7ESCh. 10.5 - Prob. 8ESCh. 10.5 - Prob. 9ESCh. 10.5 - Prob. 10ESCh. 10.5 - Prob. 11ESCh. 10.5 - Prob. 12ESCh. 10.5 - Prob. 13ESCh. 10.5 - Prob. 14ESCh. 10.5 - Prob. 15ESCh. 10.5 - Prob. 16ESCh. 10.5 - Prob. 17ESCh. 10.5 - Prob. 18ESCh. 10.5 - Prob. 19ESCh. 10.5 - Prob. 20ESCh. 10.5 - Prob. 21ESCh. 10.5 - Prob. 22ESCh. 10.5 - Prob. 23ESCh. 10.5 - Prob. 24ESCh. 10.5 - In 21-25, use the steps of Algorithm 10.5.1 to...Ch. 10.6 - Prob. 1TYCh. 10.6 - Prob. 2TYCh. 10.6 - Prob. 3TYCh. 10.6 - In Kruskal’s algorithm, the edges of a connected,...Ch. 10.6 - Prob. 5TYCh. 10.6 - Prob. 6TYCh. 10.6 - At each stage of Dijkstra’s algorithm, the vertex...Ch. 10.6 - Prob. 1ESCh. 10.6 - Prob. 2ESCh. 10.6 - Prob. 3ESCh. 10.6 - Prob. 4ESCh. 10.6 - Prob. 5ESCh. 10.6 - Prob. 6ESCh. 10.6 - Prob. 7ESCh. 10.6 - Prob. 8ESCh. 10.6 - Prob. 9ESCh. 10.6 - Prob. 10ESCh. 10.6 - A pipeline is to be built that will link six...Ch. 10.6 - Use Dijkstra’s algorithm for the airline route...Ch. 10.6 - Use Dijkstra’s algorithm to find the shortest path...Ch. 10.6 - Use Dijkstra’s algorithm to find the shortest path...Ch. 10.6 - Use Dijkstra’s algorithm to find the shortest path...Ch. 10.6 - Use Dijkstra’s algorithm to find the shortest path...Ch. 10.6 - Prob. 17ESCh. 10.6 - Prob. 18ESCh. 10.6 - Prob. 19ESCh. 10.6 - Prob. 20ESCh. 10.6 - Prob. 21ESCh. 10.6 - Prob. 22ESCh. 10.6 - Prob. 23ESCh. 10.6 - Prob. 24ESCh. 10.6 - Prob. 25ESCh. 10.6 - Prob. 26ESCh. 10.6 - Prob. 27ESCh. 10.6 - Suppose a disconnected graph is input to Kruskal’s...Ch. 10.6 - Suppose a disconnected graph is input to Prim’s...Ch. 10.6 - Modify Algorithm 10.6.3 so that the output...Ch. 10.6 - Prob. 31ES
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