Image: Fourcolorsmap
Size of this PNG preview of this SVG file: 230 × 235 pixels. Other resolution: 235 × 240 pixels.
Original image (SVG file, nominally 230 × 235 pixels, file size: 4 KB)
Description: The four color problem.
Title: Fourcolorsmap
Credit: Fourcolorsmap.png
Author: Fourcolorsmap.png: Original uploader was דוד שי at he.wikipedia derivative work: Germo (talk)
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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