PETSc version 3.15.5
TaoSetHessianRoutine
Sets the function to compute the Hessian as well as the location to store the matrix. 
Synopsis
#include "petsctao.h" 
PetscErrorCode TaoSetHessianRoutine(Tao tao, Mat H, Mat Hpre, PetscErrorCode (*func)(Tao, Vec, Mat, Mat, void*), void *ctx)
Logically collective on Tao
Input Parameters
|  | tao | - the Tao context | 
|  | H | - Matrix used for the hessian | 
|  | Hpre | - Matrix that will be used operated on by 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
   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 | 
Level
beginner
Location
src/tao/interface/taosolver_hj.c
Examples
src/ts/tutorials/ex20opt_p.c.html
src/ts/tutorials/ex20opt_ic.c.html
src/tao/unconstrained/tutorials/eptorsion1.c.html
src/tao/unconstrained/tutorials/eptorsion2.c.html
src/tao/unconstrained/tutorials/minsurf2.c.html
src/tao/unconstrained/tutorials/rosenbrock1.c.html
src/tao/unconstrained/tutorials/rosenbrock2.c.html
src/tao/unconstrained/tutorials/rosenbrock3.c.html
src/tao/unconstrained/tutorials/eptorsion2f.F.html
src/tao/unconstrained/tutorials/rosenbrock1f.F90.html
src/tao/constrained/tutorials/maros.c.html
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages