A Quadratic Form is positive semidefinite if it is never , but is 0 for some . The Quadratic Form, written in the form , is positive semidefinite Iff every Eigenvalue of is Nonnegative.

**References**

Gradshteyn, I. S. and Ryzhik, I. M. *Tables of Integrals, Series, and Products, 5th ed.* San Diego, CA:
Academic Press, p. 1106, 1979.

© 1996-9

1999-05-26