defaultschurdecomposition.java

来自「一个关于java 的常用工具包」· Java 代码 · 共 87 行

package org.jutil.math.matrix;

/**
 * A class of schur decompositions of a matrix.
 *
 * @path    $Source: /cvsroot/org-jutil/jutil.org/src/org/jutil/math/matrix/DefaultSchurDecomposition.java,v $
 * @version $Revision: 1.4 $
 * @date    $Date: 2002/07/02 14:27:31 $
 * @state   $State: Exp $
 * @author  Marko van Dooren
 * @release $Name:  $
 */
public class DefaultSchurDecomposition implements SchurDecomposition {

	/* The revision of this class */
	public final static String CVS_REVISION ="$Revision: 1.4 $";

	/**
	 * Initialize a new DefaultSchurDecomposition with the given R and Q matrices.
	 *
	 * @param R
	 *        The R matrix of the Schur decomposition.
	 * @param Q
	 *        The Q matrix of the Schur decomposition.
	 */
 /*@
	 @ public behavior
	 @
	 @ pre R != null;
	 @ pre R.isUpperTriangular();
	 @ pre Q != null;
	 @ // TODO: pre Q.isUnary();
	 @
	 @ post R().equals(R);
	 @ post Q().equals(Q);
	 @*/
	public DefaultSchurDecomposition(Matrix R, Matrix Q) {
		_R = R;
		_Q = Q;
	}

	/**
	 * See superclass
	 */
	public Matrix R() {
		return _R;
	}

	/**
	 * See superclass
	 */
	public Matrix Q() {
		return _Q;
	}

	/**
	 * Return the R matrix of this DefaultSchurDecomposition
	 */
 /*@
   @ private invariant _R != null;
	 @ private invariant _R.isUpperTriangular();
	 @*/
	private Matrix _R;

	/**
	 * Return the Q matrix of this DefaultSchurDecomposition
	 */
 /*@
   @ private invariant _Q != null;
	 @ // TODO: private invariant _Q.isUnary();
	 @*/
	private Matrix _Q;
}

/*<copyright>Copyright (C) 1997-2002. This software is copyrighted by 
the people and entities mentioned after the "@author" tags above, on 
behalf of the JUTIL.ORG Project. The copyright is dated by the dates 
after the "@date" tags above. All rights reserved.
This software is published under the terms of the JUTIL.ORG Software
License version 1.1 or later, a copy of which has been included with
this distribution in the LICENSE file, which can also be found at
http://org-jutil.sourceforge.net/LICENSE. This software is distributed WITHOUT 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
or FITNESS FOR A PARTICULAR PURPOSE. See the JUTIL.ORG Software 
License for more details.
For more information, please see http://org-jutil.sourceforge.net/</copyright>*/