Blob Blame Raw
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>SuperLU: SRC/spivotgrowth.c File Reference</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
<link href="tabs.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.5.5 -->
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="annotated.html"><span>Data&nbsp;Structures</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
    </ul>
  </div>
</div>
<div class="contents">
<h1>SRC/spivotgrowth.c File Reference</h1>Computes the reciprocal pivot growth factor. <a href="#_details">More...</a>
<p>
<code>#include &lt;math.h&gt;</code><br>
<code>#include &quot;<a class="el" href="slu__sdefs_8h-source.html">slu_sdefs.h</a>&quot;</code><br>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">float&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spivotgrowth_8c.html#9079b4ce43557af65fee107bc8f8d66f">sPivotGrowth</a> (int ncols, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *<a class="el" href="ilu__zdrop__row_8c.html#c900805a486cbb8489e3c176ed6e0d8e">A</a>, int *perm_c, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *L, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *U)</td></tr>

</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
<pre>
 -- SuperLU routine (version 2.0) --
 Univ. of California Berkeley, Xerox Palo Alto Research Center,
 and Lawrence Berkeley National Lab.
 November 15, 1997
 </pre> <hr><h2>Function Documentation</h2>
<a class="anchor" name="9079b4ce43557af65fee107bc8f8d66f"></a><!-- doxytag: member="spivotgrowth.c::sPivotGrowth" ref="9079b4ce43557af65fee107bc8f8d66f" args="(int ncols, SuperMatrix *A, int *perm_c, SuperMatrix *L, SuperMatrix *U)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float sPivotGrowth           </td>
          <td>(</td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>ncols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> *&nbsp;</td>
          <td class="paramname"> <em>A</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int *&nbsp;</td>
          <td class="paramname"> <em>perm_c</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> *&nbsp;</td>
          <td class="paramname"> <em>L</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> *&nbsp;</td>
          <td class="paramname"> <em>U</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
<pre>
 Purpose
 =======</pre><p>
<pre> Compute the reciprocal pivot growth factor of the leading ncols columns
 of the matrix, using the formula:
     min_j ( max_i(<a class="el" href="slamch_8c.html#3aa069ac3980707dae1e0530f50d59e4">abs(A_ij)</a>) / max_i(<a class="el" href="slamch_8c.html#3aa069ac3980707dae1e0530f50d59e4">abs(U_ij)</a>) )</pre><p>
<pre> Arguments
 =========</pre><p>
<pre> ncols    (input) int
          The number of columns of matrices A, L and U.</pre><p>
<pre> A        (input) SuperMatrix*
	    Original matrix A, permuted by columns, of dimension
          (A-&gt;nrow, A-&gt;ncol). The type of A can be:
          Stype = NC; Dtype = SLU_S; Mtype = GE.</pre><p>
<pre> L        (output) SuperMatrix*
          The factor L from the factorization Pr*A=L*U; use compressed row 
          subscripts storage for supernodes, i.e., L has type: 
          Stype = SC; Dtype = SLU_S; Mtype = TRLU.</pre><p>
<pre> U        (output) SuperMatrix*
	    The factor U from the factorization Pr*A*Pc=L*U. Use column-wise
          storage scheme, i.e., U has types: Stype = NC;
          Dtype = SLU_S; Mtype = TRU.
 </pre> 
</div>
</div><p>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Mon Nov 22 10:23:48 2010 for SuperLU by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.5 </small></address>
</body>
</html>