TaoDefaultComputeHessianMFFD

Computes the Hessian using finite differences with MATMFFD.

Synopsis

#include "petsctao.h"  
PetscErrorCode TaoDefaultComputeHessianMFFD(Tao tao, Vec X, Mat H, Mat B, PetscCtx ctx)

Collective

Input Parameters

• tao - the Tao context

• X - compute Hessian at this point

• ctx - ignored

Output Parameters

• H - Hessian matrix of type MATMFFD

• B - should be NULL or equal to H

Note

This can be passed to TaoSetHessian() to use MATMFFD for approximate Hessian-vector products. The matrix H can originate from MatCreateMFFD() or from TaoTermCreateHessianMFFD().

See Also

Tao, MATMFFD, MatCreateMFFD(), TaoTermCreateHessianMFFD()

Level

advanced

Location

src/tao/interface/fdiff.c

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Index of all Tao routines
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Index of all manual pages