Definition:Kampyle of Eudoxus

Definition

 * KampyleOfEudoxus.png

The Kampyle of Eudoxus has the Cartesian equation:
 * $x^4 = x^2 + y^2$

where the point $x = y = 0$ is specifically excluded.

In polar coordinates, it is described by the equation:
 * $r = \sec^2 \theta$