positive semidefinite

Let $A$ be an $n\times n$ symmetric real square matrix. If for any non-zero vector $x$ we have

 $x^{t}Ax\geq 0,$

we call $A$ a positive semidefinite matrix.

Title positive semidefinite PositiveSemidefinite 2013-03-22 12:20:10 2013-03-22 12:20:10 drini (3) drini (3) 5 drini (3) Definition msc 15A48 PositiveDefinite NegativeDefinite