org.jutil.math.matrix
Class DefaultLUDecomposition

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

All Implemented Interfaces:

LUDecomposition

public class DefaultLUDecomposition

extends java.lang.Object

implements LUDecomposition

This class represents a default LU factorization of a square non-singular matrix.

Version:

$Revision: 1.3 $

Author:

Marko van Dooren

Field Summary

static java.lang.String

CVS_REVISION

Constructor Summary

DefaultLUDecomposition(Matrix L, Matrix U, Matrix P)
public behavior

pre L != null;
pre L.isSquare();
pre L.isLowerTriangular();
pre (\forall int i; i>=1 && i<=L.getNbColumns();
L.elementAt(i,i) == 1);
pre U != null;
pre U.sameDimensions(L);
pre U.isUpperTriangular();
pre P != null;
pre P.isPermutationMatrix();
pre P.sameDimensions(L);

post L().equals(L);
post U().equals(U);
post P().equals(P);
Initialize a new DefaultLUDecomposition with the given L and U matrices

Method Summary

Matrix	L() See superclass
Matrix	P() See superclass
Matrix	U() See superclass

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

DefaultLUDecomposition

public DefaultLUDecomposition(Matrix L,
                              Matrix U,
                              Matrix P)

public behavior

pre L != null;
pre L.isSquare();
pre L.isLowerTriangular();
pre (\forall int i; i>=1 && i<=L.getNbColumns();
L.elementAt(i,i) == 1);
pre U != null;
pre U.sameDimensions(L);
pre U.isUpperTriangular();
pre P != null;
pre P.isPermutationMatrix();
pre P.sameDimensions(L);

post L().equals(L);
post U().equals(U);
post P().equals(P);
Initialize a new DefaultLUDecomposition with the given L and U matrices

Parameters:

L - The L matrix of the LU decomposition

U - The U matrix of the LU decomposition

Method Detail

L

public Matrix L()

See superclass

Specified by:

L in interface LUDecomposition

U

public Matrix U()

See superclass

Specified by:

U in interface LUDecomposition

P

public Matrix P()

See superclass

Specified by:

P in interface LUDecomposition