Four colour problem. Map of the United States of America (USA) being used to illustrate the four colour problem. This is a famous mathematical theorem that says that it is possible to colour different regions of a map (or any similar surface) using only four colours,while still ensuring that no adjacent regions are the same colour. This theorem was first proposed as a conjecture in 1862,and was proven with the aid of a computer in 2004 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 6000 px × 4000 px |
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