Variations on Ringel's earth-moon problem

DOI10.1016/S0012-365X(99)00278-2zbMath0945.05019OpenAlexW2072612858MaRDI QIDQ1969794

Gerhard Ringel, Brad Jackson

Publication date: 27 September 2000

Published in: Discrete Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/s0012-365x(99)00278-2

zbMATH Keywords

chromatic numbercurrent graphempire map

Mathematics Subject Classification ID

Planar graphs; geometric and topological aspects of graph theory (05C10) Edge subsets with special properties (factorization, matching, partitioning, covering and packing, etc.) (05C70) Coloring of graphs and hypergraphs (05C15)

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