#include "petscsnes.h" PetscErrorCode SNESGetLagPreconditioner(SNES snes,PetscInt *lag)Not Collective
| snes | - the SNES context |
| lag | - -1 indicates NEVER rebuild, 1 means rebuild every time the Jacobian is computed within a single nonlinear solve, 2 means every second time the Jacobian is built etc. -2 indicates rebuild preconditioner at next chance but then never rebuild after that |
| -snes_lag_jacobian_persists <true,false> | - sets the persistence | |
| -snes_lag_jacobian < | - 2,1,2,...> - sets the lag | |
| -snes_lag_preconditioner_persists <true,false> | - sets the persistence | |
| -snes_lag_preconditioner < | - 2,1,2,...> - sets the lag |