/usr/include/trilinos/ROL_SumOfSquares.hpp is in libtrilinos-rol-dev 12.12.1-5.
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// ************************************************************************
//
// Rapid Optimization Library (ROL) Package
// Copyright (2014) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// met:
//
// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// Denis Ridzal (dridzal@sandia.gov)
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// @HEADER
/** \file
\brief Contains definitions for sum of squares function.
\author Created by D. Ridzal and D. Kouri.
*/
#ifndef USE_HESSVEC
#define USE_HESSVEC 1
#endif
#ifndef ROL_SUMOFSQUARES_HPP
#define ROL_SUMOFSQUARES_HPP
#include "ROL_StdVector.hpp"
#include "ROL_Objective.hpp"
namespace ROL {
namespace ZOO {
/** \brief Sum of squares function.
*/
template<class Real>
class Objective_SumOfSquares : public Objective<Real> {
public:
Real value( const Vector<Real> &x, Real &tol ) {
return x.dot(x);
}
void gradient( Vector<Real> &g, const Vector<Real> &x, Real &tol ) {
g.set(x);
g.scale(2.0);
}
#if USE_HESSVEC
void hessVec( Vector<Real> &hv, const Vector<Real> &v, const Vector<Real> &x, Real &tol ) {
hv.set(v);
hv.scale(2.0);
}
#endif
void invHessVec( Vector<Real> &hv, const Vector<Real> &v, const Vector<Real> &x, Real &tol ) {
hv.set(v);
hv.scale(0.5);
}
};
template<class Real>
void getSumOfSquares( Teuchos::RCP<Objective<Real> > &obj,
Teuchos::RCP<Vector<Real> > &x0,
Teuchos::RCP<Vector<Real> > &x ) {
// Problem dimension
int n = 100;
// Get Initial Guess
Teuchos::RCP<std::vector<Real> > x0p = Teuchos::rcp(new std::vector<Real>(n,1.0));
x0 = Teuchos::rcp(new StdVector<Real>(x0p));
// Get Solution
Teuchos::RCP<std::vector<Real> > xp = Teuchos::rcp(new std::vector<Real>(n,0.0));
x = Teuchos::rcp(new StdVector<Real>(xp));
// Instantiate Objective Function
obj = Teuchos::rcp(new Objective_SumOfSquares<Real>);
}
} // End ZOO Namespace
} // End ROL Namespace
#endif
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