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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc (build 1.6.0_17) on Sat Mar 27 22:46:13 EDT 2010 --> <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <TITLE> CholeskyDecompositionImpl (Commons Math 2.1 API) </TITLE> <META NAME="date" CONTENT="2010-03-27"> <LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"> <SCRIPT type="text/javascript"> function windowTitle() { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="CholeskyDecompositionImpl (Commons Math 2.1 API)"; } } </SCRIPT> <NOSCRIPT> </NOSCRIPT> </HEAD> <BODY BGCOLOR="white" onload="windowTitle();"> <HR> <!-- ========= START OF TOP NAVBAR ======= --> <A NAME="navbar_top"><!-- --></A> <A HREF="#skip-navbar_top" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_top_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/CholeskyDecompositionImpl.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> </EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear"><B>PREV CLASS</B></A> <A HREF="../../../../../org/apache/commons/math/linear/DecompositionSolver.html" title="interface in org.apache.commons.math.linear"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html?org/apache/commons/math/linear/CholeskyDecompositionImpl.html" target="_top"><B>FRAMES</B></A> <A HREF="CholeskyDecompositionImpl.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_top"></A> <!-- ========= END OF TOP NAVBAR ========= --> <HR> <!-- ======== START OF CLASS DATA ======== --> <H2> <FONT SIZE="-1"> org.apache.commons.math.linear</FONT> <BR> Class CholeskyDecompositionImpl</H2> <PRE> <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.math.linear.CholeskyDecompositionImpl</B> </PRE> <DL> <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></DD> </DL> <HR> <DL> <DT><PRE>public class <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.34"><B>CholeskyDecompositionImpl</B></A><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></DL> </PRE> <P> Calculates the Cholesky decomposition of a matrix. <p>The Cholesky decomposition of a real symmetric positive-definite matrix A consists of a lower triangular matrix L with same size that satisfy: A = LL<sup>T</sup>Q = I). In a sense, this is the square root of A.</p> <P> <P> <DL> <DT><B>Since:</B></DT> <DD>2.0</DD> <DT><B>Version:</B></DT> <DD>$Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $</DD> <DT><B>See Also:</B><DD><a href="http://mathworld.wolfram.com/CholeskyDecomposition.html">MathWorld</a>, <a href="http://en.wikipedia.org/wiki/Cholesky_decomposition">Wikipedia</a></DL> <HR> <P> <!-- =========== FIELD SUMMARY =========== --> <A NAME="field_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Field Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static double</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD">DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</A></B></CODE> <BR> Default threshold below which diagonal elements are considered null and matrix not positive definite.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static double</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_RELATIVE_SYMMETRY_THRESHOLD">DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</A></B></CODE> <BR> Default threshold above which off-diagonal elements are considered too different and matrix not symmetric.</TD> </TR> </TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --> <A NAME="constructor_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Constructor Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix)">CholeskyDecompositionImpl</A></B>(<A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> matrix)</CODE> <BR> Calculates the Cholesky decomposition of the given matrix.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix, double, double)">CholeskyDecompositionImpl</A></B>(<A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> matrix, double relativeSymmetryThreshold, double absolutePositivityThreshold)</CODE> <BR> Calculates the Cholesky decomposition of the given matrix.</TD> </TR> </TABLE> <!-- ========== METHOD SUMMARY =========== --> <A NAME="method_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Method Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> double</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#getDeterminant()">getDeterminant</A></B>()</CODE> <BR> Return the determinant of the matrix</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#getL()">getL</A></B>()</CODE> <BR> Returns the matrix L of the decomposition.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#getLT()">getLT</A></B>()</CODE> <BR> Returns the transpose of the matrix L of the decomposition.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE> <A HREF="../../../../../org/apache/commons/math/linear/DecompositionSolver.html" title="interface in org.apache.commons.math.linear">DecompositionSolver</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#getSolver()">getSolver</A></B>()</CODE> <BR> Get a solver for finding the A × X = B solution in least square sense.</TD> </TR> </TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> </TR> </TABLE> <P> <!-- ============ FIELD DETAIL =========== --> <A NAME="field_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Field Detail</B></FONT></TH> </TR> </TABLE> <A NAME="DEFAULT_RELATIVE_SYMMETRY_THRESHOLD"><!-- --></A><H3> DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</H3> <PRE> public static final double <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.38"><B>DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</B></A></PRE> <DL> <DD>Default threshold above which off-diagonal elements are considered too different and matrix not symmetric. <P> <DL> <DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.commons.math.linear.CholeskyDecompositionImpl.DEFAULT_RELATIVE_SYMMETRY_THRESHOLD">Constant Field Values</A></DL> </DL> <HR> <A NAME="DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD"><!-- --></A><H3> DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</H3> <PRE> public static final double <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.42"><B>DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</B></A></PRE> <DL> <DD>Default threshold below which diagonal elements are considered null and matrix not positive definite. <P> <DL> <DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.commons.math.linear.CholeskyDecompositionImpl.DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD">Constant Field Values</A></DL> </DL> <!-- ========= CONSTRUCTOR DETAIL ======== --> <A NAME="constructor_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Constructor Detail</B></FONT></TH> </TR> </TABLE> <A NAME="CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix)"><!-- --></A><H3> CholeskyDecompositionImpl</H3> <PRE> public <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.71"><B>CholeskyDecompositionImpl</B></A>(<A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> matrix) throws <A HREF="../../../../../org/apache/commons/math/linear/NonSquareMatrixException.html" title="class in org.apache.commons.math.linear">NonSquareMatrixException</A>, <A HREF="../../../../../org/apache/commons/math/linear/NotSymmetricMatrixException.html" title="class in org.apache.commons.math.linear">NotSymmetricMatrixException</A>, <A HREF="../../../../../org/apache/commons/math/linear/NotPositiveDefiniteMatrixException.html" title="class in org.apache.commons.math.linear">NotPositiveDefiniteMatrixException</A></PRE> <DL> <DD>Calculates the Cholesky decomposition of the given matrix. <p> Calling this constructor is equivalent to call <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix, double, double)"><CODE>CholeskyDecompositionImpl(RealMatrix, double, double)</CODE></A> with the thresholds set to the default values <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_RELATIVE_SYMMETRY_THRESHOLD"><CODE>DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</CODE></A> and <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD"><CODE>DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</CODE></A> </p> <P> <DL> <DT><B>Parameters:</B><DD><CODE>matrix</CODE> - the matrix to decompose <DT><B>Throws:</B> <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NonSquareMatrixException.html" title="class in org.apache.commons.math.linear">NonSquareMatrixException</A></CODE> - if matrix is not square <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NotSymmetricMatrixException.html" title="class in org.apache.commons.math.linear">NotSymmetricMatrixException</A></CODE> - if matrix is not symmetric <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NotPositiveDefiniteMatrixException.html" title="class in org.apache.commons.math.linear">NotPositiveDefiniteMatrixException</A></CODE> - if the matrix is not strictly positive definite<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix, double, double)"><CODE>CholeskyDecompositionImpl(RealMatrix, double, double)</CODE></A>, <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_RELATIVE_SYMMETRY_THRESHOLD"><CODE>DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</CODE></A>, <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD"><CODE>DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</CODE></A></DL> </DL> <HR> <A NAME="CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix, double, double)"><!-- --></A><H3> CholeskyDecompositionImpl</H3> <PRE> public <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.93"><B>CholeskyDecompositionImpl</B></A>(<A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> matrix, double relativeSymmetryThreshold, double absolutePositivityThreshold) throws <A HREF="../../../../../org/apache/commons/math/linear/NonSquareMatrixException.html" title="class in org.apache.commons.math.linear">NonSquareMatrixException</A>, <A HREF="../../../../../org/apache/commons/math/linear/NotSymmetricMatrixException.html" title="class in org.apache.commons.math.linear">NotSymmetricMatrixException</A>, <A HREF="../../../../../org/apache/commons/math/linear/NotPositiveDefiniteMatrixException.html" title="class in org.apache.commons.math.linear">NotPositiveDefiniteMatrixException</A></PRE> <DL> <DD>Calculates the Cholesky decomposition of the given matrix. <P> <DL> <DT><B>Parameters:</B><DD><CODE>matrix</CODE> - the matrix to decompose<DD><CODE>relativeSymmetryThreshold</CODE> - threshold above which off-diagonal elements are considered too different and matrix not symmetric<DD><CODE>absolutePositivityThreshold</CODE> - threshold below which diagonal elements are considered null and matrix not positive definite <DT><B>Throws:</B> <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NonSquareMatrixException.html" title="class in org.apache.commons.math.linear">NonSquareMatrixException</A></CODE> - if matrix is not square <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NotSymmetricMatrixException.html" title="class in org.apache.commons.math.linear">NotSymmetricMatrixException</A></CODE> - if matrix is not symmetric <DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/NotPositiveDefiniteMatrixException.html" title="class in org.apache.commons.math.linear">NotPositiveDefiniteMatrixException</A></CODE> - if the matrix is not strictly positive definite<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#CholeskyDecompositionImpl(org.apache.commons.math.linear.RealMatrix)"><CODE>CholeskyDecompositionImpl(RealMatrix)</CODE></A>, <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_RELATIVE_SYMMETRY_THRESHOLD"><CODE>DEFAULT_RELATIVE_SYMMETRY_THRESHOLD</CODE></A>, <A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecompositionImpl.html#DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD"><CODE>DEFAULT_ABSOLUTE_POSITIVITY_THRESHOLD</CODE></A></DL> </DL> <!-- ============ METHOD DETAIL ========== --> <A NAME="method_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Method Detail</B></FONT></TH> </TR> </TABLE> <A NAME="getL()"><!-- --></A><H3> getL</H3> <PRE> public <A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.154"><B>getL</B></A>()</PRE> <DL> <DD>Returns the matrix L of the decomposition. <p>L is an lower-triangular matrix</p> <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html#getL()">getL</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the L matrix</DL> </DD> </DL> <HR> <A NAME="getLT()"><!-- --></A><H3> getLT</H3> <PRE> public <A HREF="../../../../../org/apache/commons/math/linear/RealMatrix.html" title="interface in org.apache.commons.math.linear">RealMatrix</A> <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.162"><B>getLT</B></A>()</PRE> <DL> <DD>Returns the transpose of the matrix L of the decomposition. <p>L<sup>T</sup> is an upper-triangular matrix</p> <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html#getLT()">getLT</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>the transpose of the matrix L of the decomposition</DL> </DD> </DL> <HR> <A NAME="getDeterminant()"><!-- --></A><H3> getDeterminant</H3> <PRE> public double <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.174"><B>getDeterminant</B></A>()</PRE> <DL> <DD>Return the determinant of the matrix <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html#getDeterminant()">getDeterminant</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>determinant of the matrix</DL> </DD> </DL> <HR> <A NAME="getSolver()"><!-- --></A><H3> getSolver</H3> <PRE> public <A HREF="../../../../../org/apache/commons/math/linear/DecompositionSolver.html" title="interface in org.apache.commons.math.linear">DecompositionSolver</A> <A HREF="../../../../../src-html/org/apache/commons/math/linear/CholeskyDecompositionImpl.html#line.184"><B>getSolver</B></A>()</PRE> <DL> <DD>Get a solver for finding the A × X = B solution in least square sense. <P> <DD><DL> <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html#getSolver()">getSolver</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/linear/CholeskyDecomposition.html" title="interface in org.apache.commons.math.linear">CholeskyDecomposition</A></CODE></DL> </DD> <DD><DL> <DT><B>Returns:</B><DD>a solver</DL> </DD> </DL> <!-- ========= END OF CLASS DATA ========= --> <HR> <!-- ======= START OF BOTTOM NAVBAR ====== --> <A NAME="navbar_bottom"><!-- --></A> <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_bottom_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD 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