MatMFFDSetCheckh#
Sets a function that checks the computed h and adjusts it to satisfy some criteria for the MATMFFD matrix
Synopsis#
#include "petscmat.h"
PetscErrorCode MatMFFDSetCheckh(Mat J, MatMFFDCheckhFn *fun, void *ctx)
Logically Collective
Input Parameters#
J - the
MATMFFDmatrixfun - the function that checks
h, seeMatMFFDCheckhFnctx - any context needed by the function
Options Database Keys#
-mat_mffd_check_positivity
- Ensure that \(U + h*a \) is non-negative
Notes#
For example, MatMFFDCheckPositivity() insures that all entries of U + h*a are non-negative
The function you provide is called after the default h has been computed and allows you to
modify it.
See Also#
Matrices, Mat, MATMFFD, MatMFFDCheckhFn, MatMFFDCheckPositivity()
Level#
advanced
Location#
Implementations#
MatMFFDSetCheckh_MFFD() in src/mat/impls/mffd/mffd.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages