MatMFFDCheckPositivity#
Checks that all entries in U + h*a are positive or zero, decreases h until this is satisfied for a MATMFFD
matrix
Synopsis#
#include "petscmat.h"
PetscErrorCode MatMFFDCheckPositivity(void *dummy, Vec U, Vec a, PetscScalar *h)
Logically Collective
Input Parameters#
U - base vector that is added to
a - vector that is added
h - scaling factor on a
dummy - context variable (unused)
Options Database Keys#
-mat_mffd_check_positivity
- Insure that U + h*a is nonnegative
Note#
This is rarely used directly, rather it is passed as an argument to MatMFFDSetCheckh()
See Also#
Level#
advanced
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages