4 colors = a map

Is it true that 4 colors are enough to paint any map without any neighboring country having the same color? The question seems banal, but the enigma has overshadowed more than one great mathematical mind and until recently it could be solved. Can you?

How many colors are really needed to paint a map so that no country is left with the same color? It is very likely that this question has never been raised, and that it seems to be an issue of exclusive interest to the cartographers.

However, that question, so simply described but so difficult to prove, was for more than a century one of the most difficult to solve in mathematics, and put to the test some of the most imaginative minds, including that of the mathematician and author of "Alice in Wonderland", Lewis Carrol. And it turns out that, mathematically, the answer is 4.




Semana: ¿Es cierto que 4 colores son suficientes para pintar cualquier mapa sin que ningún país vecino tenga el mismo color? (31/3/2019) Extraído de: https://www.semana.com/educacion/articulo/es-cierto-que-4-colores-son-suficientes-para-pintar-cualquier-mapa-sin-que-ningun-pais-vecino-tenga-el-mismo-color-y-por-que-importa/607683