MatSNESMFDefaultSetUmin
Sets the "umin" parameter used by the default PETSc routine for computing the differencing parameter, h, which is used for matrix-free Jacobian-vector products.
Synopsis
#include "petscsnes.h"
int MatSNESMFDefaultSetUmin(Mat A,PetscReal umin)
Input Parameters
Notes
See the manual page for MatCreateSNESMF() for a complete description of the
algorithm used to compute h.
See Also
MatSNESMFSetFunctionError(), MatCreateSNESMF()
Level:advanced
Location:src/snes/mf/snesmfjdef.c
Index of all SNESMF routines
Table of Contents for all manual pages
Index of all manual pages