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// ***********************************************************************
//
// AztecOO: An Object-Oriented Aztec Linear Solver Package
// Copyright (2002) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//@HEADER
#ifndef AZTECOO_CONDITIONNUMBER_H
#define AZTECOO_CONDITIONNUMBER_H
class Epetra_Map;
class Epetra_Vector;
class Epetra_Operator;
class AztecOO;
/*!
\brief Condition number estimator using AztecOO.
This object will estimate the condition number of an Epetra_Operator.
*/
class AztecOOConditionNumber {
public:
//! Solver type to use.
enum SolverType {
//! CG for symmetric matrices
CG_,
//! GMRES for nonsymmetric
GMRES_
};
//! Constructor.
AztecOOConditionNumber();
//! Destructor
~AztecOOConditionNumber();
//! Initialization
void initialize(const Epetra_Operator& op,
SolverType solverType=GMRES_,
int krylovSubspaceSize=100,
bool printSolve=false);
//! Estimates the condition number.
int computeConditionNumber(int maxIters, double tol);
//! Return condition number computed by last call to computeConditionNumber.
double getConditionNumber();
protected:
//! Frees all memory allocated with new by this object.
void freeMemory();
protected:
//! Condition number calculated in computeConditionNumber.
double conditionNumber_;
//! Map to create left hand side vector.
Epetra_Map* domainMap_;
//! Map to create right hand side vector.
Epetra_Map* rangeMap_;
//! Operator supplied by user in initialization.
Epetra_Operator* operator_;
//! RHS vector. This is initializaed to a random vector.
Epetra_Vector* rhs_;
//! Dummy vector. Initializaed to zero.
Epetra_Vector* dummy_;
//! solver object.
AztecOO* solver_;
//! Conditional for printing solve to output.
bool printSolve_;
};
#endif
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