petsc-dev 2014-07-25
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TaoDefaultComputeHessianColor

Computes the Hessian using colored finite differences.

Synopsis

#include "petsctao.h"  
PetscErrorCode TaoDefaultComputeHessianColor(Tao tao, Vec V, Mat H,Mat B,void *ctx)
Collective on Tao

Input Parameters

tao - the Tao context
V - compute Hessian at this point
ctx - the PetscColoring object (must be of type MatFDColoring)

Output Parameters

H - Hessian matrix (not altered in this routine)
B - newly computed Hessian matrix to use with preconditioner (generally the same as H)
flag - flag indicating whether the matrix sparsity structure has changed

See Also

TaoSetHessianRoutine(), TaoDefaultComputeHessian(),SNESComputeJacobianDefaultColor(), TaoSetGradientRoutine()

Level:advanced
Location:
src/tao/interface/fdiff.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/tao/unconstrained/examples/tutorials/minsurf2.c.html