MFEM  v4.4.0
Finite element discretization library
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mfem::OptimizationProblem Class Referenceabstract

#include <solvers.hpp>

Inheritance diagram for mfem::OptimizationProblem:
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Collaboration diagram for mfem::OptimizationProblem:
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Public Member Functions

 OptimizationProblem (int insize, const Operator *C_, const Operator *D_)
 In parallel, insize is the number of the local true dofs. More...
 
virtual double CalcObjective (const Vector &x) const =0
 Objective F(x). In parallel, the result should be reduced over tasks. More...
 
virtual void CalcObjectiveGrad (const Vector &x, Vector &grad) const
 The result grad is expected to enter with the correct size. More...
 
void SetEqualityConstraint (const Vector &c)
 
void SetInequalityConstraint (const Vector &dl, const Vector &dh)
 
void SetSolutionBounds (const Vector &xl, const Vector &xh)
 
const OperatorGetC () const
 
const OperatorGetD () const
 
const VectorGetEqualityVec () const
 
const VectorGetInequalityVec_Lo () const
 
const VectorGetInequalityVec_Hi () const
 
const VectorGetBoundsVec_Lo () const
 
const VectorGetBoundsVec_Hi () const
 
int GetNumConstraints () const
 

Public Attributes

const int input_size
 

Protected Attributes

const OperatorC
 Not owned, some can remain unused (NULL). More...
 
const OperatorD
 
const Vectorc_e
 
const Vectord_lo
 
const Vectord_hi
 
const Vectorx_lo
 
const Vectorx_hi
 

Detailed Description

Defines operators and constraints for the following optimization problem:

Find x that minimizes the objective function F(x), subject to C(x) = c_e, d_lo <= D(x) <= d_hi, x_lo <= x <= x_hi.

The operators F, C, D must take input of the same size (same width). Gradients of F, C, D might be needed, depending on the OptimizationSolver. When used with Hiop, gradients of C and D must be DenseMatrices. F always returns a scalar value, see CalcObjective(), CalcObjectiveGrad(). C and D can have arbitrary heights. C and D can be NULL, meaning that their constraints are not used.

When used in parallel, all Vectors are assumed to be true dof vectors, and the operators are expected to be defined for tdof vectors.

Definition at line 785 of file solvers.hpp.

Constructor & Destructor Documentation

mfem::OptimizationProblem::OptimizationProblem ( int  insize,
const Operator C_,
const Operator D_ 
)

In parallel, insize is the number of the local true dofs.

Definition at line 2289 of file solvers.cpp.

Member Function Documentation

virtual double mfem::OptimizationProblem::CalcObjective ( const Vector x) const
pure virtual

Objective F(x). In parallel, the result should be reduced over tasks.

virtual void mfem::OptimizationProblem::CalcObjectiveGrad ( const Vector x,
Vector grad 
) const
inlinevirtual

The result grad is expected to enter with the correct size.

Definition at line 801 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::GetBoundsVec_Hi ( ) const
inline

Definition at line 814 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::GetBoundsVec_Lo ( ) const
inline

Definition at line 813 of file solvers.hpp.

const Operator* mfem::OptimizationProblem::GetC ( ) const
inline

Definition at line 808 of file solvers.hpp.

const Operator* mfem::OptimizationProblem::GetD ( ) const
inline

Definition at line 809 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::GetEqualityVec ( ) const
inline

Definition at line 810 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::GetInequalityVec_Hi ( ) const
inline

Definition at line 812 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::GetInequalityVec_Lo ( ) const
inline

Definition at line 811 of file solvers.hpp.

int mfem::OptimizationProblem::GetNumConstraints ( ) const

Definition at line 2325 of file solvers.cpp.

void mfem::OptimizationProblem::SetEqualityConstraint ( const Vector c)

Definition at line 2299 of file solvers.cpp.

void mfem::OptimizationProblem::SetInequalityConstraint ( const Vector dl,
const Vector dh 
)

Definition at line 2307 of file solvers.cpp.

void mfem::OptimizationProblem::SetSolutionBounds ( const Vector xl,
const Vector xh 
)

Definition at line 2317 of file solvers.cpp.

Member Data Documentation

const Operator* mfem::OptimizationProblem::C
protected

Not owned, some can remain unused (NULL).

Definition at line 789 of file solvers.hpp.

const Vector* mfem::OptimizationProblem::c_e
protected

Definition at line 790 of file solvers.hpp.

const Operator * mfem::OptimizationProblem::D
protected

Definition at line 789 of file solvers.hpp.

const Vector * mfem::OptimizationProblem::d_hi
protected

Definition at line 790 of file solvers.hpp.

const Vector * mfem::OptimizationProblem::d_lo
protected

Definition at line 790 of file solvers.hpp.

const int mfem::OptimizationProblem::input_size

Definition at line 793 of file solvers.hpp.

const Vector * mfem::OptimizationProblem::x_hi
protected

Definition at line 790 of file solvers.hpp.

const Vector * mfem::OptimizationProblem::x_lo
protected

Definition at line 790 of file solvers.hpp.


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