petsc-3.8.4 2018-03-24

SNESTSFormJacobian

Function to evaluate the Jacobian

#include "petscts.h"  
PetscErrorCode  SNESTSFormJacobian(SNES snes,Vec U,Mat A,Mat B,void *ctx)

Collective on SNES

	snes	- nonlinear solver
	U	- the current state at which to evaluate the residual
	ctx	- user context, must be a TS

	A	- the Jacobian
	B	- the preconditioning matrix (may be the same as A)
	flag	- indicates any structure change in the matrix

This function is not normally called by users and is automatically registered with the SNES used by TS.