petsc3.10.4 20190226
MatMFFDSetBase
Sets the vector U at which matrix vector products of the Jacobian are computed
Synopsis
#include "petscmat.h"
PetscErrorCode MatMFFDSetBase(Mat J,Vec U,Vec F)
Logically Collective on Mat
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/examples/tutorials/ex22.c.html
Implementations
MatMFFDSetBase_MFFD in src/mat/impls/mffd/mffd.c
Index of all Mat routines
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Index of all manual pages