有没有想过这样一个问题:假如让你为一幅地图着色,需要几种颜色才能够区分开各个区域?数学历史上早在1852年就有记录。一名毕业于伦敦大学的学生格斯里(Francis Guthrie)在给地图着色时发现,每幅地图只用四种颜色就可以把相邻的国家分开。看似简单的问题,却引起了数学界的大地震。在格斯里和他正在读大学的弟弟研究无果的情况 Have you ever wondered such a question: If you were to color a map, how many colors are needed to distinguish between regions? History of mathematics dates back to 1852. Francis Guthrie, a graduate of the University of London, found that when he mapped the map, each country could be separated by only four colors per map. The seemingly simple problem, has caused a math earthquake. At Guthrie and his younger brother, who is studying at the University, he studies the fruitless situation