DUPLICATRIX
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DUPLICATRIX
A duplicatrix is a curve thanks to which it is
possible to solve the problem of the duplication of the cube (historically,
to double the volume of the altar of the oracle of Delos) - i.e. constructing
with a ruler, a compass and the curve, the number 
).
Examples: the Kampyle
of Eudoxus, the cissoid
of Diokles, the duplicatrix
cubic, one conchoid
of Nicomedes, and the (3D) Archytas
curve.
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© Robert FERRÉOL
2026