We know TREE(3) exists, and we know it's finite, but we do not know what it is or even how many digits there are. The number comes from a simple game of trees—meaning the charts used in graph ...

They used a tree-shaped graph called the Yule tree, first developed in 1924 by G. U. Yule to map genealogical history. “The full history of the evolutionary process of a given species can be neatly ...