nag_ztbrfs (f07vvc) Example Program Results

 Solution(s)
                    1                  2
 1  ( 0.0000, 2.0000)  ( 1.0000, 5.0000)
 2  ( 1.0000,-3.0000)  (-7.0000,-2.0000)
 3  (-4.0000,-5.0000)  ( 3.0000, 4.0000)
 4  ( 2.0000,-1.0000)  (-6.0000,-9.0000)

Backward errors (machine-dependent)
    4.1e-17     4.2e-17 
Estimated forward error bounds (machine-dependent)
    1.8e-14     2.2e-14