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.
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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