1. Finding pivots of matrix

Hello,

I know that number of positive pivots of symmetric matrix equals to the number of positive eigenvalues (same with negative ones).
I know how to find eigenvalues but it is not so quick. I heard that much more easier to find pivots (if i need to know how much positive/negative eigenvalues specific matrix has).

but i not sure how to find pivots.
Suppose i have matrix

$\displaystyle $\left( \begin{array}{ccc} a & b & c \\ d & e & f \\ g & h & i \end{array} \right)$$

how i calculate pivots?

thanks!

2. Re: Finding pivots of matrix

nm, I already found how to calculate pivots of symmetric matrices . It's based on Jacobi method.