Mathematics For Machine Technology
8th Edition
ISBN: 9781337798310
Author: Peterson, John.
Publisher: Cengage Learning,
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Chapter 83, Problem 3A
To determine
(a)
The sketch of the three views.
To determine
(a)
The angle C.
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7. [10 marks]
Let G = (V,E) be a 3-connected graph with at least 6 vertices. Let C be a cycle in G
of length 5. We show how to find a longer cycle in G.
(a) Let x be a vertex of G that is not on C. Show that there are three C-paths
Po, P1, P2 that are disjoint except at the shared initial vertex and only intersect
C at their final vertices.
(b) Show that at least two of P0, P1, P2 have final vertices that are adjacent along C.
(c) Combine two of Po, P1, P2 with C to produce a cycle in G that is longer than C.
Let G be a connected graph with n ≥ 2 vertices. Let A be the adjacency matrix of G.
Prove that the diameter of G is the least number d such that all the non-diagonal entries
of the matrix A are positive.
8. [10 marks]
Suppose that 15 people are at a dinner and that each person knows at least 9 of the
others. Can the diners be seated around a circular table so that each person knows both
of their immediate neighbors? Explain why your answer is correct.
Chapter 83 Solutions
Mathematics For Machine Technology
Ch. 83 - Prob. 1ACh. 83 - Prob. 2ACh. 83 - Prob. 3ACh. 83 - Prob. 4ACh. 83 - A machinist needs to lay out three holes in a...Ch. 83 - Find the size of A to the nearest second?Ch. 83 - Determine the polar coordinates of points A...Ch. 83 - Determine the polar coordinates of points A...Ch. 83 - Plot the following points on the polar coordinate...Ch. 83 - The following figure shows eight equally spaced...
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- 9. [10 marks] Consider the following graph G. (a) Find the Hamilton closure of G. Explain why your answer is correct. (b) Is G Hamiltonian? Explain why your answer is correct.arrow_forward7. [10 marks] Let G = (V,E) be a 3-connected graph with at least 6 vertices. Let C be a cycle in G of length 5. We show how to find a longer cycle in G. Ꮖ (a) Let x be a vertex of G that is not on C. Show that there are three C-paths Po, P1, P2 that are disjoint except at the shared initial vertex x and only intersect C at their final vertices. (b) Show that at least two of Po, P1, P2 have final vertices that are adjacent along C.arrow_forwardNo chatgpt pls will upvotearrow_forward
- 4. [10 marks] Let T be the following tree: Find a graph G whose block graph BL(G) is isomorphic to T. Explain why your answer is correct.arrow_forward5. [10 marks] Determine whether the graph below has a perfect matching. Explain why your answer is correct. ข พarrow_forwardLet k ≥ 1, and let G be a k-regular bipartite graph with bipartition X, Y . Prove that |X| is the minimum size of a vertex cover in G.arrow_forward
- 3. [10 marks] Let Go = (V,E) and G₁ = (V,E₁) be two graphs on the same set of vertices. Let (V, EU E1), so that (u, v) is an edge of H if and only if (u, v) is an edge of Go or of G1 (or of both). H = (a) Show that if Go and G₁ are both Eulerian and En E₁ = Ø (i.e., Go and G₁ have no edges in common), then H is also Eulerian. (b) Give an example where Go and G₁ are both Eulerian, but H is not Eulerian.arrow_forwardLet T be a tree with n vertices. Let k be the maximum degree of a vertex of T. Let l be the length of the longest path in T. Prove that l ≤ n − k +1.arrow_forwardNo chatgpt pls will upvotearrow_forward
- Determine the number of automorphisms of the following graph. Explain why your answer is correct.arrow_forwardFind the bisector of the angle <ABC in the Poincaré plane, where A=(0,5), B=(0,3) and C=(2,\sqrt{21})arrow_forwardLet l=2L\sqrt{5} and P=(1,2) in the Poincaré plane. Find the uniqe line l' through P such that l' is orthogonal to larrow_forward
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