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Coloring toroidal polyhedra with convex faces?

feb 4 11 at 18:04 Leah Wrenn Berman 460●3●6

 
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Are combinatorial configurations whose Levi graphs may be represented as covering graphs over voltage graphs realizable with pseudolines?

mar 20 10 at 17:02 Tomaž Pisanski 639●6●17

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Looking for cubic, bipartite graphs with girth at least six and no cycles of length 8.

mar 10 10 at 15:43 Tomaž Pisanski 639●6●17