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An existence theorem for planar maps. (English) Zbl 0259.05103

05C10 Planar graphs; geometric and topological aspects of graph theory
57M15 Relations of low-dimensional topology with graph theory
Full Text: DOI
[1] Heesch, H, ()
[2] Heesch, H, Chromatic reduction of the triangulations Te, e = e5 + e7, J. combinatorial theory, 13, 46-55, (1972) · Zbl 0242.05110
[3] Ore, O, ()
[4] Ore, O; Stemple, J, Numerical calculations on the four-color problem, J. combinatorial theory, 8, 65-78, (1970) · Zbl 0187.45503
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