| -tao_ntr_pc_type | - "none","ahess","bfgs","petsc" | |
| -tao_ntr_bfgs_scale_type | - type of scaling with bfgs pc, "ahess" or "bfgs" | |
| -tao_ntr_init_type | - "constant","direction","interpolation" | |
| -tao_ntr_update_type | - "reduction","interpolation" | |
| -tao_ntr_min_radius | - lower bound on trust region radius | |
| -tao_ntr_max_radius | - upper bound on trust region radius | |
| -tao_ntr_epsilon | - tolerance for accepting actual / predicted reduction | |
| -tao_ntr_mu1_i | - mu1 interpolation init factor | |
| -tao_ntr_mu2_i | - mu2 interpolation init factor | |
| -tao_ntr_gamma1_i | - gamma1 interpolation init factor | |
| -tao_ntr_gamma2_i | - gamma2 interpolation init factor | |
| -tao_ntr_gamma3_i | - gamma3 interpolation init factor | |
| -tao_ntr_gamma4_i | - gamma4 interpolation init factor | |
| -tao_ntr_theta_i | - thetha1 interpolation init factor | |
| -tao_ntr_eta1 | - eta1 reduction update factor | |
| -tao_ntr_eta2 | - eta2 reduction update factor | |
| -tao_ntr_eta3 | - eta3 reduction update factor | |
| -tao_ntr_eta4 | - eta4 reduction update factor | |
| -tao_ntr_alpha1 | - alpha1 reduction update factor | |
| -tao_ntr_alpha2 | - alpha2 reduction update factor | |
| -tao_ntr_alpha3 | - alpha3 reduction update factor | |
| -tao_ntr_alpha4 | - alpha4 reduction update factor | |
| -tao_ntr_alpha4 | - alpha4 reduction update factor | |
| -tao_ntr_mu1 | - mu1 interpolation update | |
| -tao_ntr_mu2 | - mu2 interpolation update | |
| -tao_ntr_gamma1 | - gamma1 interpolcation update | |
| -tao_ntr_gamma2 | - gamma2 interpolcation update | |
| -tao_ntr_gamma3 | - gamma3 interpolcation update | |
| -tao_ntr_gamma4 | - gamma4 interpolation update | |
| -tao_ntr_theta | - theta interpolation update |