Image: 4CT Non-Counterexample 1

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Description: Diagram showing a false disproof of the this four Colour Theorem.
Title: 4CT Non-Counterexample 1
Credit: Based on a this raster image by Dmharvey on en.wikipedia.
Author: Inductiveload
Permission: This work has been released into the public domain by its author, Dmharvey. This applies worldwide. In some countries this may not be legally possible; if so: Dmharvey grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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