Gerhard Ringel

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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 List Source URL: www.pnas.org Language: English - Date: 2005-04-22 15:17:54 Topological graph theory Conjectures Heawood conjecture Four color theorem Gerhard Ringel Torus Cayley graph Manifold Graph Graph theory Mathematics Graph coloring
2	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 Language: English Topological graph theory Conjectures Heawood conjecture Four color theorem Gerhard Ringel Torus Cayley graph Manifold Graph Graph theory Mathematics Graph coloring
3	jim mackenzie FLIGHTS of FANCY Add to Reading List Source URL: review.ucsc.edu Language: English - Date: 2006-09-29 14:49:51 Geography of California Graph coloring Discrete mathematics Ringel Lepidoptera University of California Santa Cruz Four color theorem Butterflies Santa Cruz California Mathematics Pollinators Gerhard Ringel
4	PDF Document Add to Reading List Source URL: review.ucsc.edu Language: English - Date: 2006-09-29 14:49:51 Geography of California Graph coloring Discrete mathematics Ringel Lepidoptera University of California Santa Cruz Four color theorem Butterflies Santa Cruz California Mathematics Pollinators Gerhard Ringel