petsc-3.12.5 2020-03-29
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
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| V | - compute Hessian at this point
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| ctx | - the PetscColoring object (must be of type MatFDColoring)
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Output Parameters
| H | - Hessian matrix (not altered in this routine)
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| B | - newly computed Hessian matrix to use with preconditioner (generally the same as H)
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See Also
TaoSetHessianRoutine(), TaoDefaultComputeHessian(),SNESComputeJacobianDefaultColor(), TaoSetGradientRoutine()
Level
advanced
Location
src/tao/interface/fdiff.c
Examples
src/tao/unconstrained/examples/tutorials/minsurf2.c.html
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages