F07PHF Example Program Results

 Solution(s)
             1          2
 1     -4.0000     1.0000
 2     -1.0000     4.0000
 3      2.0000     3.0000
 4      5.0000     2.0000

 Backward errors (machine-dependent)
       9.9E-17    8.3E-17
 Estimated forward error bounds (machine-dependent)
       2.4E-14    3.2E-14