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File:Four Colour Planar Graph.svg

Description Diagram showing a map coloured with four colours being transformed into a planer graph. See this Wikipedia article for more information.
Date 16 February 2007
Source Based on a this raster image by chas zzz brown on en.wikipedia.
Author Inductiveload
Permission
( Reusing this file)
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.

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