#include "petscsnes.h" PetscErrorCode SNESSetLagPreconditioner(SNES snes,PetscInt lag)Logically Collective on SNES

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 |

** Level:intermediate
Location:**src/snes/interface/snes.c

Index of all SNES routines

Table of Contents for all manual pages

Index of all manual pages