nag_lapacklin_dgtsv (f07cac) Example Program Data 5 1 : n, nrhs 2.1 -1.0 1.9 8.0 : superdiag of A 3.0 2.3 -5.0 -0.9 7.1 : main diag of A 3.4 3.6 7.0 -6.0 : subdiag of A 2.7 -0.5 2.6 0.6 2.7 : vector b