Optimist::TestSet::Brown< Real > Class Template Reference

Class container for the Brown badly scaled function. More...

#include <Brown.hh>

Inherits Optimist::Function< Real, 2, 3, Brown< Real > >.

Public Member Functions
	Brown ()
std::string	name_impl () const
bool	evaluate_impl (const InputVector &x, OutputVector &out) const
bool	first_derivative_impl (const InputVector &x, Matrix &out) const
bool	second_derivative_impl (const InputVector &, Tensor &out) const
Public Member Functions inherited from Optimist::Function< Real, 2, 3, Brown< Real > >
	Function ()
std::string	name () const
bool	evaluate (const InputVector &x, OutputVector &out) const
bool	jacobian (const InputVector &x, Matrix &out) const
bool	hessian (const InputVector &x, Tensor &out) const
Public Member Functions inherited from Optimist::FunctionBase< Real, N, M, Brown< Real >, false >
	FunctionBase ()
std::string	name () const
bool	evaluate (const InputType &x, OutputType &out) const
bool	first_derivative (const InputType &x, FirstDerivativeType &out) const
bool	second_derivative (const InputType &x, SecondDerivativeType &out) const
constexpr Integer	input_dimension () const
constexpr Integer	output_dimension () const
const std::vector< InputType > &	solutions () const
const std::vector< InputType > &	guesses () const
const InputType &	solution (Integer const i) const
const InputType &	guess (Integer const i) const
bool	is_solution (const InputType &x, Real const tol=EPSILON_LOW) const

Private Attributes
Real	m_a {1.0e-6}

Additional Inherited Members
Public Types inherited from Optimist::Function< Real, 2, 3, Brown< Real > >
using	InputVector
using	OutputVector
using	Matrix
using	Tensor
Public Types inherited from Optimist::FunctionBase< Real, N, M, Brown< Real >, false >
using	InputType
using	OutputType
using	FirstDerivativeType
using	SecondDerivativeType
Protected Attributes inherited from Optimist::FunctionBase< Real, N, M, Brown< Real >, false >
std::vector< InputType >	m_solutions
std::vector< InputType >	m_guesses

Detailed Description

template<typename Real>
class Optimist::TestSet::Brown< Real >

Class container for the Brown badly scaled function, which is defined as:

\[\mathbf{f}(\mathbf{x}) = \begin{bmatrix} x_1 - a \\ x_2 - 2a \\ x_1x_2 - 2 \end{bmatrix} \text{,} \]

where \(a = 10^{-6}\). The function has one solution at \(\mathbf{x} = [a, 2a]^\top\), with \(f(\mathbf{x}) = 0\). The initial guess is generated at \(\mathbf{x} = [1, 1]^\top\).

Template Parameters

Real	Scalar number type.

Constructor & Destructor Documentation

Brown()

template<typename Real>

Optimist::TestSet::Brown< Real >::Brown ( )

inline

Class constructor for the Brown function.

Member Function Documentation

evaluate_impl()

template<typename Real>

bool Optimist::TestSet::Brown< Real >::evaluate_impl ( const InputVector & x, OutputVector & out ) const

inline

Compute the function value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The function value.

Returns

The boolean flag for successful evaluation.

first_derivative_impl()

template<typename Real>

bool Optimist::TestSet::Brown< Real >::first_derivative_impl ( const InputVector & x, Matrix & out ) const

inline

Compute the first derivative value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The first derivative value.

Returns

The boolean flag for successful evaluation.

name_impl()

template<typename Real>

std::string Optimist::TestSet::Brown< Real >::name_impl ( ) const

inline

Get the function name.

Returns

The function name.

second_derivative_impl()

template<typename Real>

bool Optimist::TestSet::Brown< Real >::second_derivative_impl ( const InputVector & , Tensor & out ) const

inline

Compute the second derivative value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The second derivative value.

Returns

The boolean flag for successful evaluation.

Member Data Documentation

m_a

template<typename Real>

Real Optimist::TestSet::Brown< Real >::m_a {1.0e-6}

private

Scaling value (keep it low to guarantee bad scaling).

---

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

• include/Optimist/TestSet/Brown.hh