A superegg is a solid described by the equation

Supereggs will balance on either end for any , , and .

**References**

Gardner, M. ``Piet Hein's Superellipse.'' Ch. 18 in *Mathematical Carnival: A New Round-Up of Tantalizers and Puzzles from Scientific American.*
New York: Vintage, 1977.

© 1996-9

1999-05-26