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Teko_BlockLowerTriInverseOp.hpp
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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 
53 namespace Teko {
54 
64 public:
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 
106 protected:
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 
118 private:
119  // hide me!
122 };
123 
124 inline LinearOp createBlockLowerTriInverseOp(BlockedLinearOp & U,const std::vector<LinearOp> & invDiag)
125 {
126  return Teuchos::rcp(new BlockLowerTriInverseOp(U,invDiag));
127 }
128 
129 inline 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
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.
virtual VectorSpace domain() const
Domain space of this operator.
const BlockedLinearOp L_
operator
Teuchos::RCP< const Thyra::ProductVectorSpaceBase< double > > productDomain_
Domain vector space.
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.
std::vector< LinearOp > invDiag_
(Approximate) Inverses of the diagonal operators
A virtual class that simplifies the construction of custom operators.
This linear operator computes the inverse of a lower triangular matrix.
Teuchos::RCP< const Thyra::ProductVectorSpaceBase< double > > productRange_
Range vector space.
virtual VectorSpace range() const
Range space of this operator.