Bean Curve

$\begin{figure}\begin{center}\BoxedEPSF{BeanCurve.epsf scaled 700}\end{center}\end{figure}$

The Plane Curve given by the Cartesian equation

$\begin{displaymath} x^4+x^2y^2+y^4=x(x^2+y^2). \end{displaymath}$

References

Cundy, H. and Rollett, A. Mathematical Models, 3rd ed. Stradbroke, England: Tarquin Pub., 1989.