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Results tagged with planar-graphs
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user 118450
graphs that can be embedded into the plane, i.e. that can be drawn without crossings between the lines representing edges.
2
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An inequality on the number of vertex colorings of planar graphs
This answer had been redacted before the question was edited. It is NOT answering the current problem, it was dealing with graphs with maximum degree at least $5$.
I don't know about your conjecture, …
