MatMFFDSetBase#

Sets the vector U at which matrix vector products of the Jacobian are computed for the MATMFFD matrix

Synopsis#

#include "petscmat.h"   
PetscErrorCode MatMFFDSetBase(Mat J, Vec U, Vec F)

Logically Collective

Input Parameters#

J - the MATMFFD matrix
U - the vector
F - (optional) vector that contains F(u) if it has been already computed

Notes#

This is rarely used directly

If F is provided then it is not recomputed. Otherwise the function is evaluated at the base point during the first MatMult() after each call to MatMFFDSetBase().

Level#

advanced

Location#

src/mat/impls/mffd/mffd.c

Examples#

src/snes/tutorials/ex22.c

Implementations#

MatMFFDSetBase_MFFD in src/mat/impls/mffd/mffd.c

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