nag_zpprfs (f07gvc) Example Program Results

 Solution(s)
                    1                  2
 1  ( 1.0000,-1.0000)  (-1.0000, 2.0000)
 2  (-0.0000, 3.0000)  ( 3.0000,-4.0000)
 3  (-4.0000,-5.0000)  (-2.0000, 3.0000)
 4  ( 2.0000, 1.0000)  ( 4.0000,-5.0000)

Backward errors (machine-dependent)
    1.1e-16     7.9e-17 
Estimated forward error bounds (machine-dependent)
    6.1e-14     7.4e-14