Nelson asked: What is the smallest number of colors that you’d need to color any such graph, even one formed by linking an infinite number of vertices? The problem, now known as the Hadwiger-Nelson ...

A new algorithm efficiently solves the graph isomorphism problem, computer scientist László ... Corresponding nodes are shown in the same color. In math terminology, “graph” is a fancy ...

Let’s bring the power of mathematics to bear on your problem. First ... which researchers call a graph. To ensure that no two planes are in the same place at the same time, you can color each of your ...