Graphs, Vertices and Cycle Length
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A nontrivial graph G is called prime if G = G_1 x G_2 implies that G_1 or G_2 is trivial. Show that if a connected graph G has a vertex which is not in a cycle of length four, then G is prime.
where "x" is the cartesian product
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Prob 75 : Show that if a connected graph G has a vertex which is not in a cycle of length four, then G is prime.
Proof : Let G be a graph having no cycle of length ...
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