Construction of curved surfaces of the second order (conoseconds) and a full hexahedron.
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Abstract
No matter how elegant the construction of conic sections using Pascal's theorem is, it does not have sufficient generality, since it is applicable only for five real points of a curve, and in practical application it is more difficult than some other methods.
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Construction of a curved surface of the 2nd order (conoseconds) from imaginary pairs of points or an imaginary conic section.
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