info prev up next book cdrom email home

Playfair's Axiom

Through any point in space, there is exactly one straight line Parallel to a given straight line. This Axiom is equivalent to the Parallel Axiom.

See also Parallel Axiom


Dunham, W. ``Hippocrates' Quadrature of the Lune.'' Ch. 1 in Journey Through Genius: The Great Theorems of Mathematics. New York: Wiley, p. 54, 1990.

© 1996-9 Eric W. Weisstein