3.(g) For which values of n do Wn and C bipartite? Justify your answer. are

Intermediate Algebra
10th Edition
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter8: Conic Sections
Section8.1: Graphing Parabolas
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• A simple graph is called regular if every vertex of the graph has the same degree. An
n-regular graph is a graph with every vertex with degree n.
• The graph of cycle denoted by Cn, for n 2 3, consists of n vertices v1, v2, .. , vn and
edges {v1, v3}, {v2, vz}, ..., {vn-1; 'n} and {v,, v1}.
• The graph of wheel denoted by W, is obtained when an additional vertex is added to
cycle Cn, for n > 3, and connect this new vertex to each of n vertices by new edges.
3.(a) Draw C6, C7, We and W,.
3.(b) Are C, and W, regular graphs? Justify your answer.
3.(c) How many edges and vertices do Ce, C7, We and W, have?
3.(d) Let a, be the number of edges of W, and b, be the number of edges of C,, Find a recurrence
relation for a, az, az, ... and b1, b2, b3, ... . Guess the explicit formula for a, and b,. Justify
your answer.
3.(e) For which values of n do W, and C, have Euler circuit? Justify your answer.
3.(f) For which values of n does W, have Hamiltonian circuit? If so, label the vertices and find
the Hamiltonian circuit.
3.(g) For which values of n do Wn and Cn are bipartite? Justify your answer.
Transcribed Image Text:• A simple graph is called regular if every vertex of the graph has the same degree. An n-regular graph is a graph with every vertex with degree n. • The graph of cycle denoted by Cn, for n 2 3, consists of n vertices v1, v2, .. , vn and edges {v1, v3}, {v2, vz}, ..., {vn-1; 'n} and {v,, v1}. • The graph of wheel denoted by W, is obtained when an additional vertex is added to cycle Cn, for n > 3, and connect this new vertex to each of n vertices by new edges. 3.(a) Draw C6, C7, We and W,. 3.(b) Are C, and W, regular graphs? Justify your answer. 3.(c) How many edges and vertices do Ce, C7, We and W, have? 3.(d) Let a, be the number of edges of W, and b, be the number of edges of C,, Find a recurrence relation for a, az, az, ... and b1, b2, b3, ... . Guess the explicit formula for a, and b,. Justify your answer. 3.(e) For which values of n do W, and C, have Euler circuit? Justify your answer. 3.(f) For which values of n does W, have Hamiltonian circuit? If so, label the vertices and find the Hamiltonian circuit. 3.(g) For which values of n do Wn and Cn are bipartite? Justify your answer.
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