GSNESEvaluateRhsFunction

Constructs only the constant portion of the nonlinear equation, that is the portion arising from functions independent of the solution variable x.

Synopsis

#include "petscsnes.h" 
#include "gsolver.h" 
int GSNESEvaluateRhsFunction(GSNES snes, GVec x, GVec f, void *ctx)

Collective on GSNES

Input Parameters

	snes	- The grid SNES
	x	- The current iterate
	ctx	- The optional user context

Output Parameter

f -The function value

Notes

This function actually constructs -f since f is usually written on the right, and the user cannot just multiply by -1 after boundary conditions are imposed.

Keywords