This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Happy birthday to us! Kevin Knudson and I ...

Graph colouring remains a central topic in graph theory, providing the mathematical framework for assigning colours to the elements of a graph under specific constraints. In particular, the colouring ...

A theorem for coloring a large class of “perfect” mathematical networks could ease the way for a long-sought general coloring proof. Four years ago, the mathematician Maria Chudnovsky faced an all-too ...