SNESGetUseMatrixFree#
indicates if the SNES uses matrix-free finite difference matrix vector products to apply the Jacobian.
Synopsis#
#include "petscsnes.h"  
PetscErrorCode SNESGetUseMatrixFree(SNES snes, PetscBool *mf_operator, PetscBool *mf)
Not Collective, but the resulting flags will be the same on all MPI processes
Input Parameter#
- snes - - SNEScontext
Output Parameters#
- mf_operator - use matrix-free only for the Amat used by - SNESSetJacobian(), this means the user provided Pmat will continue to be used
- mf - use matrix-free for both the Amat and Pmat used by - SNESSetJacobian(), both the Amat and Pmat set in- SNESSetJacobian()will be ignored
See Also#
SNES: Nonlinear Solvers, SNES, SNESSetUseMatrixFree(), MatCreateSNESMF()
Level#
intermediate
Location#
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages