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Four color theorem
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#	Item
21	Bipartite, k-Colorable and k -Colored Graphs Add to Reading List Source URL: www.people.fas.harvard.edu Language: English - Date: 2004-01-13 03:41:42 Four color theorem List coloring Triangle-free graph Graph theory Graph coloring Bipartite graph
22	Blanuˇ sa Double ´ Add to Reading List Source URL: users.wpi.edu Language: English - Date: 2007-01-11 07:37:24 Snark Petersen graph Planar graphs Minor Cubic graph Edge coloring Toroidal graph Flower snark Four color theorem Graph theory Graph coloring Topological graph theory
23	? Lm.u..C ___flEWe SOLUTION OF THE FOUR COLORPROBLEM Add to Reading List Source URL: www.stolaf.edu Language: English - Date: 2013-03-22 09:36:19 Planar graphs Four color theorem Wolfgang Haken Kenneth Appel Reduction Chordal graph Five color theorem Graph theory Mathematics Graph coloring
24	Progress on the Four-Color Theorem PAUL SEYMOUR Add to Reading List Source URL: www.mathunion.org Language: English - Date: 2012-04-18 10:52:07 Topological graph theory Petersen graph Apex graph Linkless embedding Minor Nowhere-zero flow Cubic graph Line graph Petersen family Graph theory Graph coloring Planar graphs
25	-C ONTEMPORARY MATHEMATICS 98 Add to Reading List Source URL: www.ams.org Language: English - Date: 2012-02-02 18:30:38 Four color theorem Mathematics Subject Classification Representation theory Algebraic geometry Alexandra Bellow Operator algebra Group representation Differential geometry Combinatorics Mathematics Abstract algebra Graph coloring
26	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
27	Postmarks Used by Department of Mathematics University of Illinois at Urbana-Champaign Add to Reading List Source URL: www.math.illinois.edu - Date: 2009-11-23 14:29:53 Illinois Year of birth missing Wolfgang Haken Kenneth Appel Integer sequences Paul T. Bateman Four color theorem Mersenne prime Postmark Mathematics Number theorists Champaign County Illinois
28	On the Euler Characteristic Edward Early Abstract. We discuss the Euler Characteristic and some of the consequences of its topological invariance. We start by following the path of history that motivated the study Add to Reading List Source URL: www-math.mit.edu Language: English - Date: 2000-02-02 14:29:27 Planar graphs Topological graph theory Polyhedral combinatorics Euler characteristic Water gas and electricity Four color theorem Graph Graph structure theorem Planar separator theorem Graph theory Mathematics Graph coloring
29	Early Writings on Graph Theory: Euler Circuits and The K¨onigsberg Bridge Problem Janet Heine Barnett∗ Add to Reading List Source URL: www.math.nmsu.edu Language: English - Date: 2012-09-11 15:06:40 Graph coloring Eulerian path Leonhard Euler Induced path Four color theorem Graph Degree Seven Bridges of Königsberg Handshaking lemma Graph theory Mathematics Planar graphs
30	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

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