# Side-and-Diagonal Numbers

by F. V. Waugh and Margaret W. Maxfield

Year of Award: 1968

Publication Information: Mathematics Magazine, vol. 40, 1967, pp. 74-83

Summary:  The article deals with the history of rational approximations to irrational numbers, $a_n/b_n$. Under appropriate conditions the the numbers $a_n$ are called "diagonal numbers" and the denominators are called "side numbers."