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Rank (Quadratic Form)

For a Quadratic Form $Q$ in the canonical form


the rank is the total number $r$ of square terms (both Positive and Negative).

See also Signature (Quadratic Form)


Gradshteyn, I. S. and Ryzhik, I. M. Tables of Integrals, Series, and Products, 5th ed. San Diego, CA: Academic Press, p. 1105, 1979.

© 1996-9 Eric W. Weisstein