## Pythagoras's Constant

The number

which the Pythagoreans proved to be Irrational. The Babylonians gave the impressive approximation

(Guy 1990, Conway and Guy 1996, pp. 181-182).

References

Conway, J. H. and Guy, R. K. The Book of Numbers. New York: Springer-Verlag, p. 25 and 181-182, 1996.

Guy, R. K. Review: The Mathematics of Plato's Academy.'' Amer. Math. Monthly 97, 440-443, 1990.

Shanks, D. Solved and Unsolved Problems in Number Theory, 4th ed. New York: Chelsea, p. 126, 1993.