The distance de(u, v) of two vertices in a graph G = (V, E) is defined...
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The distance de(u, v) of two vertices in a graph G = (V, E) is defined to be the length of a shortest path connecting u and v if they belong to the same component of G and ∞ otherwise. The diameter of a graph G is defined to be max { dĠ(u, v) | u, v ¤ V }, i.e. the greatest distance between some pair of vertices in G. The complement of G = (V, E) is the graph G = (V, E) where E = { {u, v} : u, v € V & {u, v} ‡ E}. G is self-complementary if G is isomorphic to G. (i) (4 marks) Suppose that G = (V, E) and G' = (V', E') are isomorphic graphs. Show that G and G' have the same diameter. (ii) (6 marks) Let G (V, E) be a graph of diameter greater than 3. Show that G = (V, E) has diameter less than 3. (iii) (2 marks) Deduce that every self-complementary graph G has diameter ≤ 3. = The distance de(u, v) of two vertices in a graph G = (V, E) is defined to be the length of a shortest path connecting u and v if they belong to the same component of G and ∞ otherwise. The diameter of a graph G is defined to be max { dĠ(u, v) | u, v ¤ V }, i.e. the greatest distance between some pair of vertices in G. The complement of G = (V, E) is the graph G = (V, E) where E = { {u, v} : u, v € V & {u, v} ‡ E}. G is self-complementary if G is isomorphic to G. (i) (4 marks) Suppose that G = (V, E) and G' = (V', E') are isomorphic graphs. Show that G and G' have the same diameter. (ii) (6 marks) Let G (V, E) be a graph of diameter greater than 3. Show that G = (V, E) has diameter less than 3. (iii) (2 marks) Deduce that every self-complementary graph G has diameter ≤ 3. =
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Related Book For
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
Posted Date:
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