Electronic Resource
[s.l.]
:
Nature Publishing Group
Nature
169 (1952), S. 664-664
ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] When the four-colour problem could not be solved, the colouring of maps drawn on more complicated surfaces than the sphere was considered. Heawood2 proved that for all h 〉 1, any map drawn on any surface of connectivity h can always be coloured with, at most, nh colours, where nh = [3J + ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/169664a0
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