org.jutil.math.matrix
Class ExplicitShiftQRSchurDecomposer

java.lang.Object
  |
  +--org.jutil.math.matrix.ExplicitShiftQRSchurDecomposer

All Implemented Interfaces:

SchurDecomposer

public class ExplicitShiftQRSchurDecomposer

extends java.lang.Object

implements SchurDecomposer

A class of schur decomposers using an explict shift

Version:

$Revision: 1.3 $

Author:

Marko van Dooren

Field Summary

static java.lang.String

CVS_REVISION

Constructor Summary

ExplicitShiftQRSchurDecomposer(HessenbergReducer reducer)
public behavior

pre reducer != null;

post getHessenbergReducer() == reducer;
post getEpsilon ==
Initialize a new ExplicitShiftQRSchurDecomposer with the given HessenbergReducer

ExplicitShiftQRSchurDecomposer(HessenbergReducer reducer, double epsilon)
public behavior

pre reducer != null;
pre epsilon > 0;

post getHessenbergReducer() == reducer;
post getEpsilon() == epsilon;
Initialize a new ExplicitShiftQRSchurDecomposer with the given HessenbergReducer

Method Summary

SchurDecomposition	decompose(Matrix matrix) See superclass
double	getEpsilon() public behavior post \result > 0; Return the precision with which the results must be computed.
HessenbergReducer	getHessenbergReducer() public behavior post \result != null; Return the HessenbergReducer used by this ExplicitShiftQRSchurDecomposer to calculate Schur decompositions.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CVS_REVISION

public static final java.lang.String CVS_REVISION

Constructor Detail

ExplicitShiftQRSchurDecomposer

public ExplicitShiftQRSchurDecomposer(HessenbergReducer reducer)

public behavior

pre reducer != null;

post getHessenbergReducer() == reducer;
post getEpsilon ==
Initialize a new ExplicitShiftQRSchurDecomposer with the given HessenbergReducer

Parameters:

reducer - The HessenbergReducer to be used by this ExplicitShiftQRSchurDecomposer.

ExplicitShiftQRSchurDecomposer

public ExplicitShiftQRSchurDecomposer(HessenbergReducer reducer,
                                      double epsilon)

public behavior

pre reducer != null;
pre epsilon > 0;

post getHessenbergReducer() == reducer;
post getEpsilon() == epsilon;
Initialize a new ExplicitShiftQRSchurDecomposer with the given HessenbergReducer

Parameters:

reducer - The HessenbergReducer to be used by this ExplicitShiftQRSchurDecomposer.

epsilon - The precision with which the results must be computed.

Method Detail

getHessenbergReducer

public HessenbergReducer getHessenbergReducer()

public behavior

post \result != null;
Return the HessenbergReducer used by this ExplicitShiftQRSchurDecomposer to calculate Schur decompositions.

getEpsilon

public double getEpsilon()

public behavior

post \result > 0;
Return the precision with which the results must be computed.

decompose

public SchurDecomposition decompose(Matrix matrix)

See superclass

Specified by:

decompose in interface SchurDecomposer

Following copied from interface: org.jutil.math.matrix.SchurDecomposer

Parameters:

matrix - The matrix to decompose.