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Topological graph theory / Conjectures / Heawood conjecture / Four color theorem / Gerhard Ringel / Torus / Cayley graph / Manifold / Graph / Graph theory / Mathematics / Graph coloring


SOLUTION OF THE HEAWOOD MAP-COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA (SANTA CRUZ)
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Document Date: 2005-04-22 15:17:54

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