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Results tagged with planar-graphs
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user 2807
graphs that can be embedded into the plane, i.e. that can be drawn without crossings between the lines representing edges.
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Accepted
Is a distributive lattice planar iff it admits no B3 sublattice?
A stronger result is due to R. Wille. See for instance page 3 of http://www.math.uh.edu/~hjm/1973_Lattice/p00512-p00518.pdf.
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