DMMGSetSNESLocal

Sets the local user function that defines the nonlinear set of equations that will use the grid hierarchy and (optionally) its derivative. Collective on DMMG

Synopsis

int DMMGSetSNESLocal(DMMG *dmmg,DALocalFunction1 function, DALocalFunction1 jacobian,
DALocalFunction1 ad_function, DALocalFunction1 admf_function);

Input Parameter

	dmmg	- the context
	function	- the function that defines the nonlinear system
	jacobian	- function defines the local part of the Jacobian (not currently supported)
	ad_function	- the name of the function with an ad_ prefix. This is ignored if ADIC is not installed
	admf_function	- the name of the function with an ad_ prefix. This is ignored if ADIC is not installed

Options Database Keys

	-dmmg_snes_monitor	- . -dmmg_jacobian_fd
	-dmmg_jacobian_ad	- . -dmmg_jacobian_mf_fd_operator
	-dmmg_jacobian_mf_fd	- . -dmmg_jacobian_mf_ad_operator
	-dmmg_jacobian_mf_ad	-

Notes

If ADIC or ADIFOR have been installed, this routine can use ADIC or ADIFOR to compute the derivative; however, that function cannot call other functions except those in standard C math libraries.

If ADIC/ADIFOR have not been installed and the Jacobian is not provided, this routine uses finite differencing to approximate the Jacobian.

Examples