petsc-3.13.6 2020-09-29
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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

Examples

src/snes/tutorials/ex22.c.html

Implementations

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

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Index of all manual pages