Some math conjectures and theorems and proofs can take on a profound, quasi-religious status as examples of the limits of human comprehension. TREE(3) is one of those examples. "You've got all these ...
For most of us, the word graph brings back memories (not always pleasant) of pencils and rulers and quadrille ruled paper, though a more recent generation may think instead of pie and bar charts ...
When a Yule tree is not a yule tree: in 1924, G. U. Yule created a graph to map genealogical history. At this time of year, the words “Yule tree” may conjure images of brightly decorated balsam firs.