Heawood conjecture
Results: 2
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1 | SOLUTION OF THE HEAWOOD MAP-COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA (SANTA CRUZ)Add to Reading ListSource URL: www.pnas.orgLanguage: English - Date: 2005-04-22 15:17:54 |
2 | SOLUTION OF THE HEAWOOD MAP-COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA (SANTA CRUZ)Add to Reading ListSource URL: www.ncbi.nlm.nih.govLanguage: English |