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#dupin's_theorem

Dupin's theorem

In differential geometry Dupin's theorem, named after the French mathematician Charles Dupin, is the statement:The intersection curve of any pair of surfaces of different pencils of a threefold orthogonal system is a curvature line.

Thu 13th

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Dupin's theorem Malus-Dupin theorem Charles Dupin Confocal conic sections Dupin indicatrix Étienne-Louis Malus Euler's theorem (differential geometry) List of differential geometry topics Problem of Apollonius Torus
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