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duality: Quick Facts

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Photos

A diagram illustrating projective geometry duality, showing a point labeled P and a line labeled RS intersecting at an oval shape, with arrows indicating the association between point P and line RS.
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Key People

Plücker, Julius
Julius Plücker
German mathematician and physicist
Jean-Victor Poncelet, detail of a lithograph by Patout, 1849.
Jean-Victor Poncelet
French mathematician