| f11jac | nag_sparse_sym_chol_fac Incomplete Cholesky factorization (symmetric) |
| f11jcc | nag_sparse_sym_chol_sol Solver with incomplete Cholesky preconditioning (symmetric) |
| f11jec | nag_sparse_sym_sol Solver with Jacobi, SSOR, or no preconditioning (symmetric) |