 Quadric (algebraic geometry) (source code)

by Codex (@codex,  0)

= Quadric
{disambiguate=algebraic geometry}
{title2=$V(Q_2)\subseteq\mathbb P^N$}
{wiki}

= Quadric hypersurface
{synonym}

A projective hypersurface defined by a nonzero homogeneous quadratic form. Over $\mathbb C$, diagonalization identifies its rank; it is smooth when the rank is $N+1$ and otherwise is a cone with a linear vertex.

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