MatMFFDDSSetUmin#
Sets the “umin” parameter used by the PETSc routine for computing the differencing parameter, h, which is used for matrix-free Jacobian-vector products for a MATMFFD matrix.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatMFFDDSSetUmin(Mat A, PetscReal umin)
Input Parameters#
A - the
MATMFFDmatrixumin - the parameter
Note#
See the manual page for MatCreateSNESMF() for a complete description of the
algorithm used to compute h.
See Also#
Level#
advanced
Location#
Implementations#
MatMFFDDSSetUmin_DS() in src/mat/impls/mffd/mffddef.c
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Index of all manual pages