ROL
ROL_QuadraticObjective_Def.hpp
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43
44#ifndef ROL_QUADRATIC_OBJECTIVE_DEF_H
45#define ROL_QUADRATIC_OBJECTIVE_DEF_H
46
47namespace ROL {
48
49template<typename Real>
51 const Ptr<const Vector<Real>> &g,
52 Real c)
53 : H_(H), g_(g), c_(c) {
54 tmp_ = g_->clone();
55}
56
57template<typename Real>
58Real QuadraticObjective<Real>::value( const Vector<Real> &x, Real &tol ) {
59 H_->apply(*tmp_,x,tol);
60 tmp_->scale(static_cast<Real>(0.5));
61 tmp_->plus(*g_);
62 //return x.dot(tmp_->dual()) + c_;
63 return x.apply(*tmp_) + c_;
64}
65
66template<typename Real>
68 H_->apply(g,x,tol);
69 g.plus(*g_);
70}
71
72template<typename Real>
73void QuadraticObjective<Real>::hessVec( Vector<Real> &hv, const Vector<Real> &v, const Vector<Real> &x, Real &tol ) {
74 H_->apply(hv,v,tol);
75}
76
77template<typename Real>
79 H_->applyInverse(hv,v,tol);
80}
81
82} // namespace ROL
83
84#endif
Provides the interface to apply a linear operator.
void gradient(Vector< Real > &g, const Vector< Real > &x, Real &tol) override
Compute gradient.
const Ptr< const Vector< Real > > g_
void invHessVec(Vector< Real > &hv, const Vector< Real > &v, const Vector< Real > &x, Real &tol) override
Apply inverse Hessian approximation to vector.
void hessVec(Vector< Real > &hv, const Vector< Real > &v, const Vector< Real > &x, Real &tol) override
Apply Hessian approximation to vector.
QuadraticObjective(const Ptr< const LinearOperator< Real > > &H, const Ptr< const Vector< Real > > &g, Real c=Real(0))
Real value(const Vector< Real > &x, Real &tol) override
Compute value.
Defines the linear algebra or vector space interface.
virtual Real apply(const Vector< Real > &x) const
Apply to a dual vector. This is equivalent to the call .
virtual void plus(const Vector &x)=0
Compute , where .