SOLUTION OF THE HEAWOOD MAP-COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA (SANTA CRUZ)

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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) Add to Reading List Source URL: www.ncbi.nlm.nih.gov Download Document from Source Website File Size: 676,16 KB Share Document on Facebook

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