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Hippopede

\begin{figure}\begin{center}\BoxedEPSF{hippopede.epsf}\end{center}\end{figure}

A curve also known as a Horse Fetter and given by the polar equation

\begin{displaymath}
r^2=4b(a-b\sin^2\theta).
\end{displaymath}


References

Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 144-146, 1972.




© 1996-9 Eric W. Weisstein
1999-05-25