108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
//@HEADER
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// ***********************************************************************
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//
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// AztecOO: An Object-Oriented Aztec Linear Solver Package
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// Copyright (2002) Sandia Corporation
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//
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// license for use of this work by or on behalf of the U.S. Government.
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//
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// ***********************************************************************
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//@HEADER
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#ifndef AZTECOO_CONDITIONNUMBER_H
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#define AZTECOO_CONDITIONNUMBER_H
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class Epetra_Map;
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class Epetra_Vector;
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class Epetra_Operator;
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class AztecOO;
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/*!
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\brief Condition number estimator using AztecOO.
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This object will estimate the condition number of an Epetra_Operator.
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*/
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class AztecOOConditionNumber {
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public:
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//! Solver type to use.
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enum SolverType {
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//! CG for symmetric matrices
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CG_,
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//! GMRES for nonsymmetric
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GMRES_
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};
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//! Constructor.
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AztecOOConditionNumber();
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//! Destructor
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~AztecOOConditionNumber();
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//! Initialization
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void initialize(const Epetra_Operator& op,
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SolverType solverType=GMRES_,
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int krylovSubspaceSize=100,
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bool printSolve=false);
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//! Estimates the condition number.
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int computeConditionNumber(int maxIters, double tol);
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//! Return condition number computed by last call to computeConditionNumber.
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double getConditionNumber();
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protected:
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//! Frees all memory allocated with new by this object.
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void freeMemory();
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protected:
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//! Condition number calculated in computeConditionNumber.
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double conditionNumber_;
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//! Map to create left hand side vector.
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Epetra_Map* domainMap_;
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//! Map to create right hand side vector.
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Epetra_Map* rangeMap_;
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//! Operator supplied by user in initialization.
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Epetra_Operator* operator_;
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//! RHS vector. This is initializaed to a random vector.
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Epetra_Vector* rhs_;
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//! Dummy vector. Initializaed to zero.
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Epetra_Vector* dummy_;
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//! solver object.
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AztecOO* solver_;
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//! Conditional for printing solve to output.
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bool printSolve_;
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};
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#endif
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