TaoTermComputeHessian#
Evaluate the Hessian of a TaoTerm (with respect to the solution variables) for a given solution vector and parameter vector
Synopsis#
#include "petsctao.h"
PetscErrorCode TaoTermComputeHessian(TaoTerm term, Vec x, Vec params, Mat H, Mat Hpre)
Collective
Input Parameters#
term - a
TaoTermrepresenting a parametric function \(f(x; p)\)x - the solution variable \(x\) in \(f(x; p)\)
params - the parameters \(p\) in \(f(x; p)\) (may be
NULLif the term is not parametric)
Output Parameters#
H - Hessian matrix \(\nabla_x^2 f(x;p)\)
Hpre - an (approximate) Hessian from which the preconditioner will be constructed, often the same as
H
Note#
If there is no separate matrix from which to construct the preconditioner, then TaoTermComputeHessian(term, x, params, H, NULL)
and TaoTermComputeHessian(term, x, params, H, H) are equivalent.
See Also#
TaoTerm: composable objective function terms,
TaoTerm,
TaoTermComputeObjective(),
TaoTermComputeGradient(),
TaoTermComputeObjectiveAndGradient(),
TaoTermShellSetHessian()
Level#
developer
Location#
Implementations#
TaoTermComputeHessian_Callbacks() in src/tao/term/impls/callbacks/taotermcallbacks.c
TaoTermComputeHessian_Halfl2squared() in src/tao/term/impls/halfl2squared/taotermhalfl2squared.c
TaoTermComputeHessian_L1() in src/tao/term/impls/l1/taoterml1.c
TaoTermComputeHessian_Quadratic() in src/tao/term/impls/quadratic/taotermquadratic.c
TaoTermComputeHessian_Sum() in src/tao/term/impls/sum/taotermsum.c
Index of all TaoTerm routines
Table of Contents for all manual pages
Index of all manual pages