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<p>Flexible GMRES from ITSOL developed by Yousef Saad.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="slu__zdefs_8h_source.html">slu_zdefs.h</a>&quot;</code><br />
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Include dependency graph for zfgmr.c:</div>
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<tr class="memitem:a70fac857a29f956523d4c8c05e13f177"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="zfgmr_8c.html#a70fac857a29f956523d4c8c05e13f177">epsmac</a>&#160;&#160;&#160;1.0e-16</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:ac30d3185c0f6f847e371366e55e28fb6"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="zfgmr_8c.html#ac30d3185c0f6f847e371366e55e28fb6">zdotc_</a> (<a class="el" href="structdoublecomplex.html">doublecomplex</a> *, int *, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], int *, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], int *)</td></tr>
<tr class="separator:ac30d3185c0f6f847e371366e55e28fb6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4b8d5195d541b1c827f61e05b5da13a9"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="zfgmr_8c.html#a4b8d5195d541b1c827f61e05b5da13a9">dznrm2_</a> (int *, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], int *)</td></tr>
<tr class="separator:a4b8d5195d541b1c827f61e05b5da13a9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abffb8ceaa53b9b883ea0851a99033759"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="zfgmr_8c.html#abffb8ceaa53b9b883ea0851a99033759">zfgmr</a> (int n, void(*<a class="el" href="zmyblas2_8c.html#ab1eac084fbf4960e20cf730d091699c8">zmatvec</a>)(<a class="el" href="structdoublecomplex.html">doublecomplex</a>, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], <a class="el" href="structdoublecomplex.html">doublecomplex</a>, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[]), void(*<a class="el" href="zitersol1_8c.html#ae970280d13c1a6f41e71834f00776082">zpsolve</a>)(int, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], <a class="el" href="structdoublecomplex.html">doublecomplex</a>[]), <a class="el" href="structdoublecomplex.html">doublecomplex</a> *rhs, <a class="el" href="structdoublecomplex.html">doublecomplex</a> *sol, double tol, int im, int *itmax, FILE *fits)</td></tr>
<tr class="memdesc:abffb8ceaa53b9b883ea0851a99033759"><td class="mdescLeft">&#160;</td><td class="mdescRight">Simple version of the ARMS preconditioned FGMRES algorithm.  <a href="zfgmr_8c.html#abffb8ceaa53b9b883ea0851a99033759">More...</a><br /></td></tr>
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<h2 class="groupheader">Macro Definition Documentation</h2>
<a id="a70fac857a29f956523d4c8c05e13f177" name="a70fac857a29f956523d4c8c05e13f177"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a70fac857a29f956523d4c8c05e13f177">&#9670;&nbsp;</a></span>epsmac</h2>

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          <td class="memname">#define epsmac&#160;&#160;&#160;1.0e-16</td>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a4b8d5195d541b1c827f61e05b5da13a9">&#9670;&nbsp;</a></span>dznrm2_()</h2>

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          <td class="memname">double dznrm2_ </td>
          <td>(</td>
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          <td class="paramkey"></td>
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          <td class="paramtype"><a class="el" href="structdoublecomplex.html">doublecomplex</a>&#160;</td>
          <td class="paramname">[], </td>
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          <td class="paramtype">int *&#160;</td>
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<a id="ac30d3185c0f6f847e371366e55e28fb6" name="ac30d3185c0f6f847e371366e55e28fb6"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac30d3185c0f6f847e371366e55e28fb6">&#9670;&nbsp;</a></span>zdotc_()</h2>

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          <td class="memname">void zdotc_ </td>
          <td>(</td>
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          <td class="paramtype">int *&#160;</td>
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          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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          <td class="paramtype">int *&#160;</td>
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          <td class="paramtype"><a class="el" href="structdoublecomplex.html">doublecomplex</a>&#160;</td>
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<h2 class="memtitle"><span class="permalink"><a href="#abffb8ceaa53b9b883ea0851a99033759">&#9670;&nbsp;</a></span>zfgmr()</h2>

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          <td class="memname">int zfgmr </td>
          <td>(</td>
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          <td class="paramname"><em>n</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">void(*)(<a class="el" href="structdoublecomplex.html">doublecomplex</a>, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], <a class="el" href="structdoublecomplex.html">doublecomplex</a>, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[])&#160;</td>
          <td class="paramname"><em>zmatvec</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">void(*)(int, <a class="el" href="structdoublecomplex.html">doublecomplex</a>[], <a class="el" href="structdoublecomplex.html">doublecomplex</a>[])&#160;</td>
          <td class="paramname"><em>zpsolve</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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          <td class="paramtype">FILE *&#160;</td>
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<p >Y. S. Dec. 2000. &ndash; Apr. 2008</p>
<p >internal work arrays: vv = work array of length [im+1][n] (used to store the Arnoldi basis) hh = work array of length [im][im+1] (Householder matrix) z = work array of length [im][n] to store preconditioned vectors</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">n</td><td>Dimension of vectors and matrices. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">zmatvec</td><td>Operation for matrix-vector multiplication. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">zpsolve</td><td>(right) preconditioning operation. Can be a NULL pointer (GMRES without preconditioner) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">rhs</td><td>Real vector of length n containing the right hand side. </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">sol</td><td>In: Real vector of length n containing an initial guess to the solution on input. Out: Contains an approximate solution (upon successful return). </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">tol</td><td>Tolerance for stopping iteration </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">im</td><td>Krylov subspace dimension </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">itmax</td><td>In: max number of iterations allowed. Out: number of steps required to converge. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">fits</td><td>If NULL, no output. If not NULL, file handle to output "resid vs time and its". </td></tr>
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</dl>
<dl class="section return"><dt>Returns</dt><dd>Whether the algorithm finished successfully. </dd></dl>
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