Teko_LU2x2InverseOp.hpp

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#ifndef __Teko_LU2x2InverseOp_hpp__
#define __Teko_LU2x2InverseOp_hpp__

#include "Teko_Utilities.hpp"
#include "Teko_BlockImplicitLinearOp.hpp"

namespace Teko {

class LU2x2InverseOp : public BlockImplicitLinearOp {
public:
   LU2x2InverseOp(const BlockedLinearOp & A,
                       const LinearOp & invA00,
                       const LinearOp & invS);

   LU2x2InverseOp(const BlockedLinearOp & A,
                       const LinearOp & hatInvA00,
                       const LinearOp & tildeInvA00,
                       const LinearOp & invS);



   virtual VectorSpace range() const { return productRange_; }

   virtual VectorSpace domain() const { return productDomain_; }

   virtual void implicitApply(const BlockedMultiVector & x, BlockedMultiVector & y,
              const double alpha = 1.0, const double beta = 0.0) const;

   virtual void describe(Teuchos::FancyOStream & out_arg,
                         const Teuchos::EVerbosityLevel verbLevel) const;

protected:
   using BlockImplicitLinearOp::implicitApply;

   // fundamental operators to use
   const BlockedLinearOp A_;  
   const LinearOp hatInvA00_;  
   const LinearOp tildeInvA00_;  
   const LinearOp invS_;      

   // some blocks of A
   const LinearOp A10_;       
   const LinearOp A01_;       

   Teuchos::RCP<const Thyra::ProductVectorSpaceBase<double> > productRange_; 
   Teuchos::RCP<const Thyra::ProductVectorSpaceBase<double> > productDomain_; 

private:
   // hide me!
   LU2x2InverseOp();
   LU2x2InverseOp(const LU2x2InverseOp &);
};

inline LinearOp createLU2x2InverseOp(BlockedLinearOp & A,LinearOp & invA00,LinearOp & invS)
{
   return Teuchos::rcp(new LU2x2InverseOp(A,invA00,invS));
}

inline LinearOp createLU2x2InverseOp(BlockedLinearOp & A,LinearOp & invA00,LinearOp & invS,const std::string & str)
{
   Teuchos::RCP<Thyra::LinearOpBase<double> > result = Teuchos::rcp(new LU2x2InverseOp(A,invA00,invS));
   result->setObjectLabel(str);

   return result;
}

inline LinearOp createLU2x2InverseOp(BlockedLinearOp & A,LinearOp & hatInvA00,LinearOp & tildeInvA00,LinearOp & invS)
{
   return Teuchos::rcp(new LU2x2InverseOp(A,hatInvA00,tildeInvA00,invS));
}

inline LinearOp createLU2x2InverseOp(BlockedLinearOp & A,LinearOp & hatInvA00,LinearOp & tildeInvA00,LinearOp & invS,const std::string & str)
{
   Teuchos::RCP<Thyra::LinearOpBase<double> > result = Teuchos::rcp(new LU2x2InverseOp(A,hatInvA00,tildeInvA00,invS));
   result->setObjectLabel(str);

   return result;
}

} // end namespace Teko

#endif