nag_zhprfs (f07pvc) Example Program Results

 Solution(s)
                    1                  2
 1  ( 1.0000,-1.0000)  ( 3.0000,-4.0000)
 2  (-1.0000, 2.0000)  (-1.0000, 5.0000)
 3  ( 3.0000,-2.0000)  ( 7.0000,-2.0000)
 4  ( 2.0000, 1.0000)  (-8.0000, 6.0000)

Backward errors (machine-dependent)
    5.7e-17     5.8e-17 
Estimated forward error bounds (machine-dependent)
    2.5e-15     3.1e-15