nag_dsprfs (f07phc) 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)
    5.7e-17     1.0e-16 
Estimated forward error bounds (machine-dependent)
    2.3e-14     3.4e-14