High Quality Content by WIKIPEDIA articles! In mathematics, a twisted cubic is a smooth, rational curve C of degree three in projective 3-space mathbb{P}^3. It is a fundamental example of a skew curve. It is essentially unique, up to projective transformation (the twisted cubic, therefore). It is generally considered to be the simplest example of a projective variety that isn't linear or a hypersurface, and is given as such in most textbooks on algebraic geometry. It is the three-dimensional case of the rational normal curve, and is the image of a Veronese map of degree three on the projective line.

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