petsc-dev 2014-07-30
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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
hess - Hessian evaluation routine
ctx - [optional] user-defined context for private data for the Hessian evaluation routine (may be NULL)

Calling sequence of hess

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

Examples

src/tao/unconstrained/examples/tutorials/eptorsion1.c.html
src/tao/unconstrained/examples/tutorials/eptorsion2.c.html
src/tao/unconstrained/examples/tutorials/minsurf2.c.html
src/tao/unconstrained/examples/tutorials/rosenbrock1.c.html
src/tao/unconstrained/examples/tutorials/eptorsion2f.F.html
src/tao/unconstrained/examples/tutorials/rosenbrock1f.F.html
src/tao/constrained/examples/tutorials/maros.c.html
src/tao/constrained/examples/tutorials/toy.c.html
src/tao/constrained/examples/tutorials/toyf.F.html
src/tao/bound/examples/tutorials/plate2.c.html
src/tao/bound/examples/tutorials/jbearing2.c.html