petsc-3.7.4 2016-10-02
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MatMFFDSetCheckh

Sets a function that checks the computed h and adjusts it to satisfy some criteria

Synopsis

#include "petscmat.h"   
PetscErrorCode  MatMFFDSetCheckh(Mat J,PetscErrorCode (*fun)(void*,Vec,Vec,PetscScalar*),void *ctx)
Logically Collective on Mat

Input Parameters

J - the MatMFFD matrix
fun - the function that checks h
ctx - any context needed by the function

Options Database Keys

-mat_mffd_check_positivity -

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

MatMFFDCheckPositivity()

Level:advanced
Location:
src/mat/impls/mffd/mffd.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages