petsc-3.8.4 2018-03-24

TaoLineSearchComputeObjectiveAndGTS

Computes the objective function value and inner product of gradient and step direction at a given point

#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchComputeObjectiveAndGTS(TaoLineSearch ls, Vec x, PetscReal *f, PetscReal *gts)

Collective on Tao

	ls	- the TaoLineSearch context
	x	- input vector

	f	- Objective value at X
	gts	- inner product of gradient and step direction at X

Notes: TaoLineSearchComputeObjectiveAndGTS() is typically used within line searches so most users would not generally call this routine themselves.