MinimizationEnvironment.hpp

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// This file is part of GQCG-GQCP.
//
// Copyright (C) 2017-2020  the GQCG developers
//
// GQCG-GQCP is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GQCG-GQCP is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GQCG-GQCP.  If not, see <http://www.gnu.org/licenses/>.
 
#pragma once
 
 
#include "Mathematical/Optimization/OptimizationEnvironment.hpp"
#include "Mathematical/Representation/Matrix.hpp"
 
 
namespace GQCP {
 
 
template <typename _Scalar>
class MinimizationEnvironment:
    public OptimizationEnvironment<VectorX<_Scalar>> {
 
public:
    using Scalar = _Scalar;
 
 
public:
    VectorFunction<Scalar> gradient_function;  // a callable function that produces the gradient of the scalar function, evaluated at the given variables
    MatrixFunction<Scalar> hessian_function;   // a callable function that produces the Hessian of the scalar function, evaluated at the given variables
 
    std::deque<double> function_values;  // values for the evaluated scalar function (often a sort of 'cost' function)
 
 
public:
    /*
     *  CONSTRUCTORS
     */
 
    MinimizationEnvironment(const VectorX<_Scalar>& initial_guess, const VectorFunction<Scalar>& gradient_function, const MatrixFunction<Scalar>& hessian_function) :
        OptimizationEnvironment<VectorX<_Scalar>>(initial_guess),
        gradient_function {gradient_function},
        hessian_function {hessian_function} {}
};
 
 
}  // namespace GQCP