On the four colour map theorem.
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Publication:1519904
zbMath28.0426.01MaRDI QIDQ1519904
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Publication date: 1898
Published in: The Quarterly Journal of Pure and Applied Mathematics (Search for Journal in Brave)
Planar graphs; geometric and topological aspects of graph theory (05C10) Coloring of graphs and hypergraphs (05C15)
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