ROL
ROL_PQNObjective_Def.hpp
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43
44#ifndef ROL_PQNOBJECTIVEDEF_H
45#define ROL_PQNOBJECTIVEDEF_H
46
47
48namespace ROL {
49
50template<typename Real>
52 const Vector<Real> &x,
53 const Vector<Real> &g)
54 : secant_(secant), x_(x.clone()), g_(g.clone()), pwa_(x.clone()), dwa_(g.clone()) {
55 setAnchor(x,g);
56}
57
58template<typename Real>
59Real PQNObjective<Real>::value( const Vector<Real> &x, Real &tol ) {
60 pwa_->set(x);
61 pwa_->axpy(static_cast<Real>(-1),*x_);
62 secant_->applyB(*dwa_, *pwa_);
63 dwa_->scale(static_cast<Real>(0.5));
64 dwa_->plus(*g_);
65 return dwa_->apply(*pwa_);
66}
67
68template<typename Real>
70 pwa_->set(x);
71 pwa_->axpy(static_cast<Real>(-1),*x_);
72 secant_->applyB(g, *pwa_);
73 g.plus(*g_);
74}
75
76template<typename Real>
77void PQNObjective<Real>::hessVec( Vector<Real> &hv, const Vector<Real> &v, const Vector<Real> &x, Real &tol ) {
78 secant_->applyB(hv, v);
79}
80
81template<typename Real>
83 x_->set(x); g_->set(g);
84}
85
86} // namespace ROL
87
88#endif
void setAnchor(const Vector< Real > &x, const Vector< Real > &g)
void gradient(Vector< Real > &g, const Vector< Real > &x, Real &tol) override
Compute gradient.
void hessVec(Vector< Real > &hv, const Vector< Real > &v, const Vector< Real > &x, Real &tol) override
Apply Hessian approximation to vector.
Real value(const Vector< Real > &x, Real &tol) override
Compute value.
PQNObjective(const Ptr< Secant< Real > > &secant, const Vector< Real > &x, const Vector< Real > &g)
Provides interface for and implements limited-memory secant operators.
Definition: ROL_Secant.hpp:79
Defines the linear algebra or vector space interface.
Definition: ROL_Vector.hpp:84
virtual void plus(const Vector &x)=0
Compute , where .