#include "petsctao.h" PetscErrorCode TaoComputeHessian(Tao tao, Vec X, Mat H, Mat Hpre)Collective on Tao
tao | - the Tao solver context | |
X | - input vector |
H | - Hessian matrix | |
Hpre | - Preconditioning matrix |
-tao_test_hessian | - compare the user provided Hessian with one compute via finite differences to check for errors | |
-tao_test_hessian <numerical value> | - display entries in the difference between the user provided Hessian and finite difference Hessian that are greater than a certain value to help users detect errors | |
-tao_test_hessian_view | - display the user provided Hessian, the finite difference Hessian and the difference between them to help users detect the location of errors in the user provided Hessian |
TaoComputeHessian() is typically used within minimization implementations, so most users would not generally call this routine themselves.
Level: developer
Location:taosolver_hj.c