petsc-3.7.1 2016-05-15
MatMFFDWPSetComputeNormU
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 "petscmat.h"
PetscErrorCode MatMFFDWPSetComputeNormU(Mat A,PetscBool flag)
Input Parameters
Options Database Key
-mat_mffd_compute_normu <true,false> -true by default, false can save calculations but you Many brmust be sure that ||U|| has not changed in the mean time. Many br
Many br
Notes
See the manual page for MATMFFD_WP for a complete description of the Many bralgorithm used to compute h. Many br
See Also
MatMFFDSetFunctionError(), MatCreateSNESMF()
Level:advanced
Location:src/mat/impls/mffd/wp.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages