petsc-3.13.6 2020-09-29
MatMFFDCheckPositivity
Checks that all entries in U + h*a are positive or zero, decreases h until this is satisfied.
Synopsis
#include "petscmat.h"
PetscErrorCode MatMFFDCheckPositivity(void *dummy,Vec U,Vec a,PetscScalar *h)
Logically Collective on Vec
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 -
Notes
This is rarely used directly, rather it is passed as an argument to
MatMFFDSetCheckh()
See Also
MatMFFDSetCheckh()
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