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Signature (Quadratic Form)

The signature of the Quadratic Form


is the number $p$ of Positive squared terms in the reduced form. (The signature is sometimes defined as $2p-r$.)

See also p-Signature, Rank (Quadratic Form), Sylvester's Inertia Law, Sylvester's Signature


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