dtrsyl example program

This example solves the Sylvester equation

A X + X B = C

, where

A = (\begin{array}{r} 0.10 & 0.50 & 0.68 & - 0.21 \\ - 0.50 & 0.10 & - 0.24 & 0.67 \\ 0.00 & 0.00 & 0.19 & - 0.35 \\ 0.00 & 0.00 & 0.00 & - 0.72 \end{array}),

B = (\begin{array}{r} - 0.99 & - 0.17 & 0.39 & 0.58 \\ 0.00 & 0.48 & - 0.84 & - 0.15 \\ 0.00 & 0.00 & 0.75 & 0.25 \\ 0.00 & 0.00 & - 0.25 & 0.75 \end{array})

and

C = (\begin{array}{r} 0.63 & - 0.56 & 0.08 & - 0.23 \\ - 0.45 & - 0.31 & 0.27 & 1.21 \\ 0.20 & - 0.35 & 0.41 & 0.84 \\ 0.49 & - 0.05 & - 0.52 & - 0.08 \end{array}) .

Example program for dtrsyl