SNESPicardComputeJacobian — PETSc 3.25.4 documentation

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# SNESPicardComputeJacobian

Trivial Jacobian assembly callback used by `SNESSetPicard()`; the Picard operator is filled in by `SNESPicardComputeFunction()`

## Synopsis

    #include "petscsnes.h"
    #include "petscsnes.h"
    PetscErrorCode SNESPicardComputeJacobian(SNES snes, Vec x1, Mat J, Mat B, PetscCtx ctx)

Collective

## Input Parameters

- snes - the `SNES` context

- x1 - the current iterate (unused)

- J - the Jacobian matrix to assemble

- B - the preconditioning matrix (unused)

- ctx - unused application context

## Note

Only calls `MatAssemblyBegin()`/`MatAssemblyEnd()` on `J`, because the Picard iteration reuses the operator already assembled by `SNESPicardComputeFunction()`.

## See Also

SNES: Nonlinear Solvers, `SNES`, `SNESSetPicard()`, `SNESPicardComputeFunction()`, `SNESPicardComputeMFFunction()`

## Level

developer

## Location

src/snes/interface/snes.c

## Examples

src/snes/tutorials/ex15.c

Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages