nag_zporfs (f07fvc) 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) 5.9e-17 4.8e-17 Estimated forward error bounds (machine-dependent) 6.0e-14 7.2e-14