petsc-dev 2014-07-25
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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
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex22.c.html