MatSNESMFWPSetComputeNormU
Sets whether it computes the ||U|| used by the WP PETSc routine for computing h. With any Krylov solver this need only be computed during the first iteration and kept for later.
Synopsis
#include "petscsnes.h"
PetscErrorCode PETSCSNES_DLLEXPORT MatSNESMFWPSetComputeNormU(Mat A,PetscTruth flag)
Input Parameters
Options Database Key
-snes_mf_compute_normu <true,false> -true by default, false can save calculations but you
must be sure that ||U|| has not changed in the mean time.
Notes
See the manual page for MATSNESMF_WP for a complete description of the
algorithm used to compute h.
See Also
MatSNESMFSetFunctionError(), MatCreateSNESMF()
Level:advanced
Location:src/snes/mf/wp.c
Index of all SNESMF routines
Table of Contents for all manual pages
Index of all manual pages