nag_lapacklin_dpbrfs (f07hhc) Example Program Results Solution(s) 1 2 1 5.0000 -2.0000 2 -2.0000 6.0000 3 -3.0000 -1.0000 4 1.0000 4.0000 Backward errors (machine-dependent) 1.1e-16 1.1e-16 Estimated forward error bounds (machine-dependent) 2.1e-14 3.0e-14