MoochoPack::CheckDescentQuasiNormalStep_Step Class Reference

Checks for descent in the decomposed equality constraints with respect to the range space step Ypy using finite differences. More...

#include <MoochoPack_CheckDescentQuasiNormalStep_Step.hpp>

Inheritance diagram for MoochoPack::CheckDescentQuasiNormalStep_Step:

Public Member Functions
	STANDARD_COMPOSITION_MEMBERS (CalcFiniteDiffProd, calc_fd_prod)
	Set the object that will compute the finite difference products. More...
	CheckDescentQuasiNormalStep_Step (const calc_fd_prod_ptr_t &calc_fd_prod)
	Constructor. More...
Public Member Functions inherited from IterationPack::AlgorithmStep
virtual	~AlgorithmStep ()
virtual void	initialize_step (Algorithm &algo, poss_type step_poss, EDoStepType type, poss_type assoc_step_poss)
	Called by Algorithm just before the algorithm is run. More...
virtual void	inform_updated (Algorithm &algo, poss_type step_poss, EDoStepType type, poss_type assoc_step_poss)
	Called by Algorithm to inform when a runtime configuration change is finihed. More...
virtual void	finalize_step (Algorithm &algo, poss_type step_poss, EDoStepType type, poss_type assoc_step_poss)
	Called by Algorithm just after an algorithm is terminiated. More...

Overridden from AlgorithmStep
bool	do_step (Algorithm &algo, poss_type step_poss, IterationPack::EDoStepType type, poss_type assoc_step_poss)
void	print_step (const Algorithm &algo, poss_type step_poss, IterationPack::EDoStepType type, poss_type assoc_step_poss, std::ostream &out, const std::string &leading_str) const

Additional Inherited Members
Public Types inherited from IterationPack::AlgorithmStep
typedef size_t	poss_type

Detailed Description

Checks for descent in the decomposed equality constraints with respect to the range space step Ypy using finite differences.

This step class checks for descent in the feasibility measure q(x) = 1/2 * cd(x)'*cd(x) <: REAL of the decomposed equality constraints cd(x) = c(equ_decomp)(x) with respect to the range space step Ypy_k. The gradient of this feasibility measure is:

grad(q(x),x) = grad(cd(x),x) * cd(x)

Therefore, we can determine if we have descent by checking grad(q(x),x)'*Ypy_k = cd(x)'*grad(cd(x),x)'*Ypy_k< 0. The product grad(c(x),x)'*Ypy_k is approximated with finite differences using the class MoochoPack::CalcFiniteDiffProd.

Definition at line 66 of file MoochoPack_CheckDescentQuasiNormalStep_Step.hpp.

Constructor & Destructor Documentation

MoochoPack::CheckDescentQuasiNormalStep_Step::CheckDescentQuasiNormalStep_Step

(

const calc_fd_prod_ptr_t &

calc_fd_prod

)

Constructor.

Definition at line 58 of file MoochoPack_CheckDescentQuasiNormalStep_Step.cpp.

Member Function Documentation

MoochoPack::CheckDescentQuasiNormalStep_Step::STANDARD_COMPOSITION_MEMBERS	(	CalcFiniteDiffProd	,
		calc_fd_prod
	)

Set the object that will compute the finite difference products.

bool MoochoPack::CheckDescentQuasiNormalStep_Step::do_step ( Algorithm &  algo, poss_type  step_poss, IterationPack::EDoStepType  type, poss_type  assoc_step_poss  )

virtual

Implements IterationPack::AlgorithmStep.

Definition at line 64 of file MoochoPack_CheckDescentQuasiNormalStep_Step.cpp.

void MoochoPack::CheckDescentQuasiNormalStep_Step::print_step ( const Algorithm &  algo, poss_type  step_poss, IterationPack::EDoStepType  type, poss_type  assoc_step_poss, std::ostream &  out, const std::string &  leading_str  ) const

virtual

Reimplemented from IterationPack::AlgorithmStep.

Definition at line 152 of file MoochoPack_CheckDescentQuasiNormalStep_Step.cpp.

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The documentation for this class was generated from the following files:

• MoochoPack_CheckDescentQuasiNormalStep_Step.hpp
• MoochoPack_CheckDescentQuasiNormalStep_Step.cpp