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Teko_BlockLowerTriInverseOp.hpp
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6// Teko: A package for block and physics based preconditioning
7// Copyright 2010 Sandia Corporation
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9// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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46
47#ifndef __Teko_BlockLowerTriInverseOp_hpp__
48#define __Teko_BlockLowerTriInverseOp_hpp__
49
50#include "Teko_Utilities.hpp"
51#include "Teko_BlockImplicitLinearOp.hpp"
52
53namespace Teko {
54
64public:
66
76 BlockLowerTriInverseOp(BlockedLinearOp & L,const std::vector<LinearOp> & invDiag);
77
79
80
82 virtual VectorSpace range() const { return productRange_; }
83
85 virtual VectorSpace domain() const { return productDomain_; }
86
99 virtual void implicitApply(const BlockedMultiVector & x, BlockedMultiVector & y,
100 const double alpha = 1.0, const double beta = 0.0) const;
102
103 virtual void describe(Teuchos::FancyOStream &out_arg,
104 const Teuchos::EVerbosityLevel verbLevel) const;
105
106protected:
107 // fundamental operators to use
108 const BlockedLinearOp L_;
109 std::vector<LinearOp> invDiag_;
110
111 Teuchos::RCP<const Thyra::ProductVectorSpaceBase<double> > productRange_;
112 Teuchos::RCP<const Thyra::ProductVectorSpaceBase<double> > productDomain_;
113
114 // scratch space...so we don't have to reallocate
115 mutable BlockedMultiVector srcScrap_;
116 mutable BlockedMultiVector dstScrap_;
117
118private:
119 // hide me!
122};
123
124inline LinearOp createBlockLowerTriInverseOp(BlockedLinearOp & U,const std::vector<LinearOp> & invDiag)
125{
126 return Teuchos::rcp(new BlockLowerTriInverseOp(U,invDiag));
127}
128
129inline LinearOp createBlockLowerTriInverseOp(BlockedLinearOp & L,const std::vector<LinearOp> & invDiag,const std::string & str)
130{
131 Teuchos::RCP<Thyra::LinearOpBase<double> > result = Teuchos::rcp(new BlockLowerTriInverseOp(L,invDiag));
132 result->setObjectLabel(str);
133
134 return result;
135}
136
137} // end namespace Teko
138
139#endif
A virtual class that simplifies the construction of custom operators.
virtual void implicitApply(const BlockedMultiVector &x, BlockedMultiVector &y, const double alpha=1.0, const double beta=0.0) const =0
Perform a matrix vector multiply with this implicitly defined blocked operator.
This linear operator computes the inverse of a lower triangular matrix.
virtual VectorSpace range() const
Range space of this operator.
virtual VectorSpace domain() const
Domain space of this operator.
virtual void implicitApply(const BlockedMultiVector &x, BlockedMultiVector &y, const double alpha=1.0, const double beta=0.0) const
Perform a matrix vector multiply with this operator.
Teuchos::RCP< const Thyra::ProductVectorSpaceBase< double > > productRange_
Range vector space.
std::vector< LinearOp > invDiag_
(Approximate) Inverses of the diagonal operators
Teuchos::RCP< const Thyra::ProductVectorSpaceBase< double > > productDomain_
Domain vector space.