Indefinite Quadratic Form
A Quadratic Form 
is indefinite if it is less than 
for some values and greater than for others. The QuadraticForm, written in the form 
, is indefinite if Eigenvalues of the Matrix 
are ofboth signs.
References
Gradshteyn, I. S. and Ryzhik, I. M. Tables of Integrals, Series, and Products, 5th ed. San Diego, CA: Academic Press, p. 1106, 1979.
- Seashell
- Secant
- Secant Line
- Secant Method
- Secant Number
- Sech
- Second
- Second Curvature
- Second Derivative Test
- Second Fundamental Tensor
- Sectional Curvature
- Section (Graph)
- Section (Pencil)
- Section (Tangent Bundle)
- Sector
- Sectorial Harmonic
- Secular Equation
- Seed
- Seed of Life
- Seek Time
- Segment
- Segmented Number
- Segner's Recurrence Formula
- Segre's Theorem
- Seiberg-Witten Equations