ROL
ROL_BlockOperator2Determinant.hpp
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43
44#ifndef ROL_BLOCKOPERATOR2DETERMINANT_H
45#define ROL_BLOCKOPERATOR2DETERMINANT_H
46
48
56namespace ROL {
57
58template <class Real>
60
61 typedef Vector<Real> V;
63
64private:
65
66 ROL::Ptr<OP> A_, B_, C_, D_;
67 ROL::Ptr<V> scratch_;
68
69public:
70
71 BlockOperator2Determinant( ROL::Ptr<OP> &A,
72 ROL::Ptr<OP> &B,
73 ROL::Ptr<OP> &C,
74 ROL::Ptr<OP> &D,
75 ROL::Ptr<V> &scratch ) :
76 A_(A), B_(B), C_(C), D_(D), scratch_(scratch) {}
77
78
79 virtual void update( const Vector<Real> &x, bool flag = true, int iter = -1 ) {
80 A_->update(x,flag,true);
81 B_->update(x,flag,true);
82 C_->update(x,flag,true);
83 D_->update(x,flag,true);
84 }
85
86 // Apply the determinant \f$(A-BD^{-1}B)\f$
87 virtual void apply( Vector<Real> &Hv, const Vector<Real> &v, Real &tol ) const {
88 B_->apply(*scratch_,v,tol);
89 D_->applyInverse(Hv,*scratch_,tol);
90 C_->apply(*scratch_,Hv,tol);
91 A_->apply(Hv,v,tol);
92 Hv.axpy(-1.0,*scratch_);
93 }
94
95 virtual void applyInverse( Vector<Real> &Hv, const Vector<Real> &v, Real &tol ) const {
96
97 ROL_TEST_FOR_EXCEPTION( true , std::logic_error,
98 ">>> ERROR (ROL_BlockOperator2Determinant, applyInverse): "
99 "Not implemented.");
100 }
101
102}; // class BlockOperator2Determinant
103
104} // namespace ROL
105
106#endif // ROL_BLOCKOPERATOR2DETERMINANT_H
virtual void update(const Vector< Real > &x, bool flag=true, int iter=-1)
Update linear operator.
virtual void apply(Vector< Real > &Hv, const Vector< Real > &v, Real &tol) const
Apply linear operator.
BlockOperator2Determinant(ROL::Ptr< OP > &A, ROL::Ptr< OP > &B, ROL::Ptr< OP > &C, ROL::Ptr< OP > &D, ROL::Ptr< V > &scratch)
virtual void applyInverse(Vector< Real > &Hv, const Vector< Real > &v, Real &tol) const
Apply inverse of linear operator.
Provides the interface to apply a linear operator.
Defines the linear algebra or vector space interface.
Definition: ROL_Vector.hpp:84
virtual void axpy(const Real alpha, const Vector &x)
Compute where .
Definition: ROL_Vector.hpp:153