Superellipse
A curve of the form
where
. ``The'' superellipse is sometimes taken as the curve of the above form with 
. Superellipses with
are also known as Lamé Curves. The above curves are for 
, 
, and 
, 3.0,and 3.5.
A degenerate superellipse is a superellipse with 
. The above curves are for , , and 
, 1.0, 1.5,and 2.0.
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.
- Shortening
- Shuffle
- Siamese Dodecahedron
- Siamese Method
- Sibling
- Sicherman Dice
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- Side
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- Siegel Disk Fractal
- Siegel Modular Function
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- Sierpinski Sieve
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- Sierpinski's Prime Sequence Theorem