nag_real_sym_posdef_tridiag_lin_solve (f04bgc) Example Program Results Solution 1 2 1 2.5000 2.0000 2 2.0000 -1.0000 3 1.0000 -3.0000 4 -1.0000 6.0000 5 3.0000 -5.0000 Estimate of condition number 1.1e+02 Estimate of error bound for computed solutions 1.2e-14