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BIQUARTIC

Biquartics are the algebraic curves of degree 8.

Examples: toroids,
Cayley's
ovals, triellipses,
hearts
of Raphaël Laporte and of Pierre Daniel.

A nice biquartic with a triple point where the tangents
coincide, suggested by Carlos Sacré: .
Cartesian equation: . |

© Robert FERRÉOL 2017