dspsvx example program

This example solves the equations

$A X = B,$

where

$A$ is the symmetric matrix

$A = (\begin{matrix} - 1.81 & 2.06 & 0.63 & - 1.15 \\ 2.06 & 1.15 & 1.87 & 4.20 \\ 0.63 & 1.87 & - 0.21 & 3.87 \\ - 1.15 & 4.20 & 3.87 & 2.07 \end{matrix}) and B = (\begin{matrix} 0.96 & 3.93 \\ 6.07 & 19.25 \\ 8.38 & 9.90 \\ 9.50 & 27.85 \end{matrix}) .$

Error estimates for the solutions, and an estimate of the reciprocal of the condition number of the matrix

$A$ are also output.

Example program for dspsvx