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Epispiral


Epispiral

The epispiral is a plane curve with polar equation

 r=asec(ntheta).

There are n sections if n is odd and 2n if n is even.

EpispiralAbs

A slightly more symmetric version considers instead

 r=a|sec(ntheta)|.

See also

Cotes' Spiral, Kampyle of Eudoxus

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References

Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 192-193, 1972.

Referenced on Wolfram|Alpha

Epispiral

Cite this as:

Weisstein, Eric W. "Epispiral." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Epispiral.html

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