CORNOID
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CORNOID
| Curve studied by Alberto Sanchez in 1895. |
Cartesian parametrization:  .
Cartesian equation: 
Rational sextic. |
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| Given a horizontal line cutting the circle with centre O and radius a at P and P', the cornoid is the locus of the projection M of P on the parallel to (OP) passing through P'. |
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The cornoid is also the orthoptic
of the Maltese cross.
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© Robert FERRÉOL 2021