<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.5"/>
<title>Eigen-unsupported: DGMRES< _MatrixType, _Preconditioner > Class Template Reference</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
$(window).load(resizeHeight);
</script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/javascript">
$(document).ready(function() { searchBox.OnSelectItem(0); });
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="eigendoxy.css" rel="stylesheet" type="text/css">
<!-- -->
<script type="text/javascript" src="eigen_navtree_hacks.js"></script>
<!-- <script type="text/javascript"> -->
<!-- </script> -->
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<!-- <a name="top"></a> -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectlogo"><img alt="Logo" src="Eigen_Silly_Professor_64x64.png"/></td>
<td style="padding-left: 0.5em;">
<div id="projectname"><a href="http://eigen.tuxfamily.org">Eigen-unsupported</a>
 <span id="projectnumber">3.2.0</span>
</div>
</td>
<td> <div id="MSearchBox" class="MSearchBoxInactive">
<span class="left">
<img id="MSearchSelect" src="search/mag_sel.png"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
alt=""/>
<input type="text" id="MSearchField" value="Search" accesskey="S"
onfocus="searchBox.OnSearchFieldFocus(true)"
onblur="searchBox.OnSearchFieldFocus(false)"
onkeyup="searchBox.OnSearchFieldChange(event)"/>
</span><span class="right">
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.5 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "search",false,'Search');
</script>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
$(document).ready(function(){initNavTree('classEigen_1_1DGMRES.html','');});
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Pages</a></div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div class="header">
<div class="summary">
<a href="classEigen_1_1DGMRES-members.html">List of all members</a> |
<a href="#pub-methods">Public Member Functions</a> |
<a href="#pro-methods">Protected Member Functions</a> </div>
<div class="headertitle">
<div class="title">DGMRES< _MatrixType, _Preconditioner > Class Template Reference</div> </div>
</div><!--header-->
<div class="contents">
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _MatrixType, typename _Preconditioner = DiagonalPreconditioner<typename _MatrixType::Scalar>><br/>
class Eigen::DGMRES< _MatrixType, _Preconditioner ></h3>
<p>A Restarted <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> with deflation. This class implements a modification of the <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> solver for sparse linear systems. The basis is built with modified Gram-Schmidt. At each restart, a few approximated eigenvectors corresponding to the smallest eigenvalues are used to build a preconditioner for the next cycle. This preconditioner for deflation can be combined with any other preconditioner, the IncompleteLUT for instance. The preconditioner is applied at right of the matrix and the combination is multiplicative. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">_MatrixType</td><td>the type of the sparse matrix A, can be a dense or a sparse matrix. </td></tr>
<tr><td class="paramname">_Preconditioner</td><td>the type of the preconditioner. Default is DiagonalPreconditioner Typical usage : <div class="fragment"><div class="line">* SparseMatrix<double> A;</div>
<div class="line">* VectorXd x, b; </div>
<div class="line">* <span class="comment">//Fill A and b ...</span></div>
<div class="line">* DGMRES<SparseMatrix<double> > solver;</div>
<div class="line">* solver.set_restart(30); <span class="comment">// Set restarting value</span></div>
<div class="line">* solver.setEigenv(1); <span class="comment">// Set the number of eigenvalues to deflate</span></div>
<div class="line">* solver.compute(A);</div>
<div class="line">* x = solver.solve(b);</div>
<div class="line">* </div>
</div><!-- fragment --></td></tr>
</table>
</dd>
</dl>
<p>References : [1] D. NUENTSA WAKAM and F. PACULL, Memory Efficient Hybrid Algebraic Solvers for Linear Systems Arising from Compressible Flows, Computers and Fluids, In Press, <a href="http://dx.doi.org/10.1016/j.compfluid.2012.03.023">http://dx.doi.org/10.1016/j.compfluid.2012.03.023</a> [2] K. Burrage and J. Erhel, On the performance of various adaptive preconditioned <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> strategies, 5(1998), 101-121. [3] J. Erhel, K. Burrage and B. Pohl, Restarted <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> preconditioned by deflation,J. Computational and Applied Mathematics, 69(1996), 303-318. </p>
</div>
<p>Inherits IterativeSolverBase< DGMRES< _MatrixType, _Preconditioner > >.</p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a62f9d64844caff6007cabecc997fbad1"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#a62f9d64844caff6007cabecc997fbad1">deflSize</a> ()</td></tr>
<tr class="separator:a62f9d64844caff6007cabecc997fbad1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acebe7001a430de6ff6059e42a2c3d7e1"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#acebe7001a430de6ff6059e42a2c3d7e1">DGMRES</a> ()</td></tr>
<tr class="separator:acebe7001a430de6ff6059e42a2c3d7e1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a13ee3911a809ab56f9d207f4201134ad"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#a13ee3911a809ab56f9d207f4201134ad">DGMRES</a> (const MatrixType &A)</td></tr>
<tr class="separator:a13ee3911a809ab56f9d207f4201134ad"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae246359e104d63520158c26329caac80"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#ae246359e104d63520158c26329caac80">restart</a> ()</td></tr>
<tr class="separator:ae246359e104d63520158c26329caac80"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a88b3d18c69eccbd4b1c68a5713a05bb3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#a88b3d18c69eccbd4b1c68a5713a05bb3">set_restart</a> (const int <a class="el" href="classEigen_1_1DGMRES.html#ae246359e104d63520158c26329caac80">restart</a>)</td></tr>
<tr class="separator:a88b3d18c69eccbd4b1c68a5713a05bb3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a16852b8c7e2b1a8154937d392d342051"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#a16852b8c7e2b1a8154937d392d342051">setEigenv</a> (const int neig)</td></tr>
<tr class="separator:a16852b8c7e2b1a8154937d392d342051"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afed207f423f44020219ac444b982dcf9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#afed207f423f44020219ac444b982dcf9">setMaxEigenv</a> (const int maxNeig)</td></tr>
<tr class="separator:afed207f423f44020219ac444b982dcf9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3ceaab72040862ca224adc3984eed08c"><td class="memTemplParams" colspan="2">template<typename Rhs , typename Guess > </td></tr>
<tr class="memitem:a3ceaab72040862ca224adc3984eed08c"><td class="memTemplItemLeft" align="right" valign="top">const <br class="typebreak"/>
internal::solve_retval_with_guess<br class="typebreak"/>
< <a class="el" href="classEigen_1_1DGMRES.html">DGMRES</a>, Rhs, Guess > </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#a3ceaab72040862ca224adc3984eed08c">solveWithGuess</a> (const MatrixBase< Rhs > &b, const Guess &x0) const </td></tr>
<tr class="separator:a3ceaab72040862ca224adc3984eed08c"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:ac77967ca048597f4b4cba3a6bf00b0a4"><td class="memTemplParams" colspan="2">template<typename Rhs , typename Dest > </td></tr>
<tr class="memitem:ac77967ca048597f4b4cba3a6bf00b0a4"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#ac77967ca048597f4b4cba3a6bf00b0a4">dgmres</a> (const MatrixType &mat, const Rhs &rhs, Dest &x, const Preconditioner &precond) const </td></tr>
<tr class="memdesc:ac77967ca048597f4b4cba3a6bf00b0a4"><td class="mdescLeft"> </td><td class="mdescRight">Perform several cycles of restarted <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> with modified Gram Schmidt,. <a href="#ac77967ca048597f4b4cba3a6bf00b0a4">More...</a><br/></td></tr>
<tr class="separator:ac77967ca048597f4b4cba3a6bf00b0a4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad56b61782bcd392b88b807c9e6099e02"><td class="memTemplParams" colspan="2">template<typename Dest > </td></tr>
<tr class="memitem:ad56b61782bcd392b88b807c9e6099e02"><td class="memTemplItemLeft" align="right" valign="top">int </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classEigen_1_1DGMRES.html#ad56b61782bcd392b88b807c9e6099e02">dgmresCycle</a> (const MatrixType &mat, const Preconditioner &precond, Dest &x, DenseVector &r0, RealScalar &beta, const RealScalar &normRhs, int &nbIts) const </td></tr>
<tr class="memdesc:ad56b61782bcd392b88b807c9e6099e02"><td class="mdescLeft"> </td><td class="mdescRight">Perform one restart cycle of <a class="el" href="classEigen_1_1DGMRES.html" title="A Restarted GMRES with deflation. This class implements a modification of the GMRES solver for sparse...">DGMRES</a>. <a href="#ad56b61782bcd392b88b807c9e6099e02">More...</a><br/></td></tr>
<tr class="separator:ad56b61782bcd392b88b807c9e6099e02"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a class="anchor" id="acebe7001a430de6ff6059e42a2c3d7e1"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classEigen_1_1DGMRES.html">DGMRES</a> </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Default constructor. </p>
<p>Referenced by <a class="el" href="classEigen_1_1DGMRES.html#a3ceaab72040862ca224adc3984eed08c">DGMRES< _MatrixType, _Preconditioner >::solveWithGuess()</a>.</p>
</div>
</div>
<a class="anchor" id="a13ee3911a809ab56f9d207f4201134ad"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classEigen_1_1DGMRES.html">DGMRES</a> </td>
<td>(</td>
<td class="paramtype">const MatrixType & </td>
<td class="paramname"><em>A</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Initialize the solver with matrix <em>A</em> for further <code>Ax=b</code> solving.</p>
<p>This constructor is a shortcut for the default constructor followed by a call to compute().</p>
<dl class="section warning"><dt>Warning</dt><dd>this class stores a reference to the matrix A as well as some precomputed values that depend on it. Therefore, if <em>A</em> is changed this class becomes invalid. Call compute() to update it with the new matrix A, or modify a copy of A. </dd></dl>
</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="a62f9d64844caff6007cabecc997fbad1"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">int deflSize </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the size of the deflation subspace size </p>
</div>
</div>
<a class="anchor" id="ac77967ca048597f4b4cba3a6bf00b0a4"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void dgmres </td>
<td>(</td>
<td class="paramtype">const MatrixType & </td>
<td class="paramname"><em>mat</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const Rhs & </td>
<td class="paramname"><em>rhs</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">Dest & </td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const Preconditioner & </td>
<td class="paramname"><em>precond</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">protected</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Perform several cycles of restarted <a class="el" href="classEigen_1_1GMRES.html" title="A GMRES solver for sparse square problems. ">GMRES</a> with modified Gram Schmidt,. </p>
<p>A right preconditioner is used combined with deflation. </p>
</div>
</div>
<a class="anchor" id="ad56b61782bcd392b88b807c9e6099e02"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">int dgmresCycle </td>
<td>(</td>
<td class="paramtype">const MatrixType & </td>
<td class="paramname"><em>mat</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const Preconditioner & </td>
<td class="paramname"><em>precond</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">Dest & </td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">DenseVector & </td>
<td class="paramname"><em>r0</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">RealScalar & </td>
<td class="paramname"><em>beta</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const RealScalar & </td>
<td class="paramname"><em>normRhs</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"><em>nbIts</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">protected</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Perform one restart cycle of <a class="el" href="classEigen_1_1DGMRES.html" title="A Restarted GMRES with deflation. This class implements a modification of the GMRES solver for sparse...">DGMRES</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mat</td><td>The coefficient matrix </td></tr>
<tr><td class="paramname">precond</td><td>The preconditioner </td></tr>
<tr><td class="paramname">x</td><td>the new approximated solution </td></tr>
<tr><td class="paramname">r0</td><td>The initial residual vector </td></tr>
<tr><td class="paramname">beta</td><td>The norm of the residual computed so far </td></tr>
<tr><td class="paramname">normRhs</td><td>The norm of the right hand side vector </td></tr>
<tr><td class="paramname">nbIts</td><td>The number of iterations </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ae246359e104d63520158c26329caac80"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">int restart </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the restart value </p>
<p>Referenced by <a class="el" href="classEigen_1_1DGMRES.html#a88b3d18c69eccbd4b1c68a5713a05bb3">DGMRES< _MatrixType, _Preconditioner >::set_restart()</a>.</p>
</div>
</div>
<a class="anchor" id="a88b3d18c69eccbd4b1c68a5713a05bb3"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void set_restart </td>
<td>(</td>
<td class="paramtype">const int </td>
<td class="paramname"><em>restart</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Set the restart value (default is 30) </p>
<p>References <a class="el" href="classEigen_1_1DGMRES.html#ae246359e104d63520158c26329caac80">DGMRES< _MatrixType, _Preconditioner >::restart()</a>.</p>
</div>
</div>
<a class="anchor" id="a16852b8c7e2b1a8154937d392d342051"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void setEigenv </td>
<td>(</td>
<td class="paramtype">const int </td>
<td class="paramname"><em>neig</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Set the number of eigenvalues to deflate at each restart </p>
</div>
</div>
<a class="anchor" id="afed207f423f44020219ac444b982dcf9"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void setMaxEigenv </td>
<td>(</td>
<td class="paramtype">const int </td>
<td class="paramname"><em>maxNeig</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Set the maximum size of the deflation subspace </p>
</div>
</div>
<a class="anchor" id="a3ceaab72040862ca224adc3984eed08c"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">const internal::solve_retval_with_guess<<a class="el" href="classEigen_1_1DGMRES.html">DGMRES</a>, Rhs, Guess> solveWithGuess </td>
<td>(</td>
<td class="paramtype">const MatrixBase< Rhs > & </td>
<td class="paramname"><em>b</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const Guess & </td>
<td class="paramname"><em>x0</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>the solution x of <img class="formulaInl" alt="$ A x = b $" src="form_64.png"/> using the current decomposition of A <em>x0</em> as an initial solution.</dd></dl>
<dl class="section see"><dt>See Also</dt><dd>compute() </dd></dl>
<p>References <a class="el" href="classEigen_1_1DGMRES.html#acebe7001a430de6ff6059e42a2c3d7e1">DGMRES< _MatrixType, _Preconditioner >::DGMRES()</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="DGMRES_8h_source.html">DGMRES.h</a></li>
</ul>
</div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="namespaceEigen.html">Eigen</a></li><li class="navelem"><a class="el" href="classEigen_1_1DGMRES.html">DGMRES</a></li>
<li class="footer">Generated on Mon Oct 28 2013 11:05:27 for Eigen-unsupported by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.5 </li>
</ul>
</div>
<!-- Piwik -->
<!--
<script type="text/javascript">
var pkBaseURL = (("https:" == document.location.protocol) ? "https://stats.sylphide-consulting.com/piwik/" : "http://stats.sylphide-consulting.com/piwik/");
document.write(unescape("%3Cscript src='" + pkBaseURL + "piwik.js' type='text/javascript'%3E%3C/script%3E"));
</script><script type="text/javascript">
try {
var piwikTracker = Piwik.getTracker(pkBaseURL + "piwik.php", 20);
piwikTracker.trackPageView();
piwikTracker.enableLinkTracking();
} catch( err ) {}
</script><noscript><p><img src="http://stats.sylphide-consulting.com/piwik/piwik.php?idsite=20" style="border:0" alt="" /></p></noscript>
-->
<!-- End Piwik Tracking Code -->
</body>
</html>
