Is a graph with only vertices and no edges counted as a planar graph? And is a graph with only one edge also considered as a planar graph.
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2One edge... and no vertices? – Parcly Taxel Aug 11 '19 at 19:16
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2You can draw a graph with no edges in the plane with no edges crossing, so yes, it's planar. – saulspatz Aug 11 '19 at 19:17
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One edge 2 vertices. – Zirconia Aug 11 '19 at 19:46
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Thanks for clearing the confusion. – Zirconia Aug 11 '19 at 19:47