Positive Semidefinite Matrix
A Matrix 
is positive semidefinite if
for all
.See also Positive Definite Matrix- Stationary Tangent
- Stationary Value
- Statistic
- Statistical Test
- Statistics
- Staudt-Clausen Theorem
- Steenrod Algebra
- Steenrod-Eilenberg Axioms
- Steenrod's Realization Problem
- Steepest Descent Method
- Steffensen's Inequality
- Steffenson's Formula
- Steinbach Screw
- Steiner Chain
- Steiner Construction
- Steinerian Curve
- Steiner-Lehmus Theorem
- Steiner Points
- Steiner Quadruple System
- Steiner's Ellipse
- Steiner Set
- Steiner's Hypocycloid
- Steiner's Porism
- Steiner's Problem
- Steiner's Segment Problem