GVecEvaluateJacobian

Evaluates the action of the system matrix over the active fields on the locations defined by the underlying grid and its discretization.

#include "gvec.h" 
int GVecEvaluateJacobian(GVec v, GVec x, GVec y, void *ctx)

	x	- The argument vector to the Jacobian
	y	- The vector to which the Jacobian is applied
	ctx	- An optional user provided context for the function

v -The result vector J(x) y