| -snes_linesearch_alpha<1e | - 4> - slope descent parameter | |
| -snes_linesearch_damping<1.0> | - initial step length | |
| -snes_linesearch_maxstep <length> | - if the length the initial step is larger than this then the step is scaled back to be of this length at the beginning of the line search | |
| -snes_linesearch_max_it<40> | - maximum number of shrinking step | |
| -snes_linesearch_minlambda<1e | - 12> - minimum step length allowed | |
| -snes_linesearch_order<cubic,quadratic> | - order of the approximation |