Some topological approaches to the four color problem
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Publication:4403464
DOI10.1090/S0002-9904-1973-13327-0zbMath0277.55004MaRDI QIDQ4403464
Publication date: 1973
Published in: Bulletin of the American Mathematical Society (Search for Journal in Brave)
Planar graphs; geometric and topological aspects of graph theory (05C10) Relations of low-dimensional topology with graph theory (57M15) Coloring of graphs and hypergraphs (05C15) Fiber bundles in algebraic topology (55R10)
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