Questions about the branch of combinatorics called graph theory (not to be used for questions concerning the graph of a function). This tag can be further specialized via using it in combination with more specialized tags such as extremal-graph-theory, spectral-graph-theory, algebraic-graph-theory, topological-graph-theory, random-graphs, graph-colorings and several others.
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If this edit preserves the intended meaning then it helps avoid confusion with maps corresponding to planar graphs. If it doesn't then some other clarification might be useful.
Ben Barber
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