petsc-3.8.4 2018-03-24

SNESJacobianFunction

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

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

	x	- input vector
	Amat	- the matrix that defines the (approximate) Jacobian
	Pmat	- the matrix to be used in constructing the preconditioner, usually the same as Amat.
	ctx	- [optional] user-defined Jacobian context