nag_zgbrfs (f07bvc) Example Program Results

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

Backward errors (machine-dependent)
    1.8e-17     6.7e-17 
Estimated forward error bounds (machine-dependent)
    3.5e-14     4.3e-14