TaoSetHessian#

Sets the function to compute the Hessian as well as the location to store the matrix.

Synopsis#

#include "petsctao.h" 
PetscErrorCode TaoSetHessian(Tao tao, Mat H, Mat Hpre, PetscErrorCode (*func)(Tao, Vec, Mat, Mat, void *), void *ctx)

Logically Collective

Input Parameters#

tao - the Tao context
H - Matrix used for the hessian
Hpre - Matrix that will be used to construct the preconditioner, can be same as H
func - Hessian evaluation routine
ctx - [optional] user-defined context for private data for the Hessian evaluation routine (may be NULL)

Calling sequence of `func`#

PetscErrorCode func(Tao tao, Vec x, Mat H, Mat Hpre, void *ctx);

tao - the Tao context
x - input vector
H - Hessian matrix
Hpre - matrix used to construct the preconditioner, usually the same as H
ctx - [optional] user-defined Hessian context

See Also#

TAO: Optimization Solvers, Tao, TaoTypes, TaoSetObjective(), TaoSetGradient(), TaoSetObjectiveAndGradient(), TaoGetHessian()

Level#

beginner

Location#

src/tao/interface/taosolver_hj.c

Examples#

src/tao/bound/tutorials/jbearing2.c
src/tao/bound/tutorials/plate2.c
src/tao/bound/tutorials/plate2f.F90
src/tao/constrained/tutorials/ex1.c
src/tao/constrained/tutorials/maros.c
src/tao/constrained/tutorials/tomographyADMM.c
src/tao/tutorials/ex4.c
src/tao/unconstrained/tutorials/eptorsion1.c
src/tao/unconstrained/tutorials/eptorsion2.c
src/tao/unconstrained/tutorials/eptorsion2f.F90
src/tao/unconstrained/tutorials/eptorsion3.c

Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages