PETSc version 3.17.5
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TaoGetHessian

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

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoGetHessian(Tao tao, Mat *H, Mat *Hpre, PetscErrorCode (**func)(Tao, Vec, Mat, Mat, void*), void **ctx)
Not collective

Input Parameter

tao - the Tao context

OutputParameters

H - Matrix used for the hessian
Hpre - Matrix that will be used operated on by preconditioner, can be the same as H
func - Hessian evaluation routine
ctx - user-defined context for private data for the Hessian evaluation routine

Calling sequence of func

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

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

See Also

TaoGetObjective(), TaoGetGradient(), TaoGetObjectiveAndGradient(), TaoSetHessian()

Level

beginner

Location

src/tao/interface/taosolver_hj.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages