petsc-3.12.5 2020-03-29
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SNESJacobianFunction

Function used to convey the nonlinear Jacobian of the function to be solved by SNES

Synopsis

#include "petscsnes.h"
PetscErrorCode SNESJacobianFunction(SNES snes,Vec x,Mat Amat,Mat Pmat,void *ctx);
Collective on snes

Input Parameters

x - input vector, the Jacobian is to be computed at this value
ctx - [optional] user-defined Jacobian context

Output Parameters

Amat - the matrix that defines the (approximate) Jacobian
Pmat - the matrix to be used in constructing the preconditioner, usually the same as Amat.

See Also

SNESSetFunction(), SNESGetFunction(), SNESSetJacobian(), SNESGetJacobian()

Level

intermediate

Location

src/snes/interface/snes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages