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DOUBLE U

Homemade name. |

Cartesian equation: ,
or .
Cartesian parametrization: . Rational quartic. Area delimited by the curve and its asymptotes: (double than that of the blue disk opposite). |

The double u is the image of the circle by an axial inversion with axis a diameter; here, the image of the circle
by .

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© Robert FERRÉOL 2017