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141 lines
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141 lines
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<!--l. 717--><div class="crosslinks"><p class="noindent"><span
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class="cmr-12">[</span><a
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<h4 class="subsectionHead"><span class="titlemark"><span
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class="cmr-12">5.3 </span></span> <a
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id="x20-190005.3"></a><span
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class="cmr-12">Method hierarchy</span><span
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class="cmr-12">_build</span></h4>
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<div class="center"
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>
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<!--l. 719--><p class="noindent" >
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<!--l. 720--><p class="noindent" ><code class="lstinline"><span style="color:#000000">call</span><span style="color:#000000"> </span><span style="color:#000000">p</span><span style="color:#000000">%</span><span style="color:#000000">hierarchy_build</span><span style="color:#000000">(</span><span style="color:#000000">a</span><span style="color:#000000">,</span><span style="color:#000000">desc_a</span><span style="color:#000000">,</span><span style="color:#000000">info</span><span style="color:#000000">)</span></code><br />
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</div>
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<!--l. 723--><p class="noindent" ><span
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class="cmr-12">This method builds the hierarchy of matrices and restriction/prolongation operators for</span>
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<span
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class="cmr-12">the multilevel preconditioner </span><code class="lstinline"><span style="color:#000000">p</span></code><span
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class="cmr-12">, according to the requirements made by the user</span>
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<span
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class="cmr-12">through the methods </span><code class="lstinline"><span style="color:#000000">init</span></code> <span
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class="cmr-12">and </span><code class="lstinline"><span style="color:#000000">set</span></code><span
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class="cmr-12">.</span>
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<!--l. 728--><p class="noindent" ><span
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class="cmbx-12">Arguments</span>
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<div class="tabular"> <table id="TBL-12" class="tabular"
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><colgroup id="TBL-12-1g"><col
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id="TBL-12-1"><col
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id="TBL-12-2"></colgroup><tr
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style="vertical-align:baseline;" id="TBL-12-1-"><td style="white-space:normal; text-align:left;" id="TBL-12-1-1"
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class="td11"> <!--l. 731--><p class="noindent" ><code class="lstinline"><span style="color:#000000">a</span></code> </td><td style="white-space:normal; text-align:left;" id="TBL-12-1-2"
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class="td11"> <!--l. 731--><p class="noindent" ><code class="lstinline"><span style="color:#000000">type</span><span style="color:#000000">(</span><span style="color:#000000">psb_</span></code><span
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class="cmti-12">x</span><code class="lstinline"><span style="color:#000000">spmat_type</span><span style="color:#000000">),</span><span style="color:#000000"> </span><span style="color:#000000">intent</span><span style="color:#000000">(</span><span style="color:#000000">in</span><span style="color:#000000">)</span></code><span
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class="cmr-12">.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-2-"><td style="white-space:normal; text-align:left;" id="TBL-12-2-1"
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class="td11"> <!--l. 732--><p class="noindent" > </td><td style="white-space:normal; text-align:left;" id="TBL-12-2-2"
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class="td11"> <!--l. 732--><p class="noindent" ><span
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class="cmr-12">The sparse matrix structure containing the local part of the matrix</span>
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<span
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class="cmr-12">to be preconditioned. Note that </span><span
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class="cmti-12">x </span><span
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class="cmr-12">must be chosen according to the</span>
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<code class="lstinline"><span style="color:#000000">real</span></code><span
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class="cmr-12">/</span><code class="lstinline"><span style="color:#000000">complex</span></code><span
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class="cmr-12">, single/double precision version of AMG4PSBLAS</span>
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<span
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class="cmr-12">under use. See the PSBLAS User’s Guide for details </span><span class="cite"><span
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class="cmr-12">[</span><a
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href="userhtmlli5.html#XPSBLASGUIDE"><span
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class="cmr-12">21</span></a><span
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class="cmr-12">]</span></span><span
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class="cmr-12">.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-3-"><td style="white-space:normal; text-align:left;" id="TBL-12-3-1"
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class="td11"> <!--l. 737--><p class="noindent" ><code class="lstinline"><span style="color:#000000">desc_a</span></code> </td><td style="white-space:normal; text-align:left;" id="TBL-12-3-2"
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class="td11"> <!--l. 737--><p class="noindent" ><code class="lstinline"><span style="color:#000000">type</span><span style="color:#000000">(</span><span style="color:#000000">psb_desc_type</span><span style="color:#000000">),</span><span style="color:#000000"> </span><span style="color:#000000">intent</span><span style="color:#000000">(</span><span style="color:#000000">in</span><span style="color:#000000">)</span></code><span
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class="cmr-12">.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-4-"><td style="white-space:normal; text-align:left;" id="TBL-12-4-1"
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class="td11"> <!--l. 738--><p class="noindent" > </td><td style="white-space:normal; text-align:left;" id="TBL-12-4-2"
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class="td11"> <!--l. 738--><p class="noindent" ><span
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class="cmr-12">The communication descriptor of </span><code class="lstinline"><span style="color:#000000">a</span></code><span
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class="cmr-12">. See the PSBLAS User’s Guide</span>
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<span
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class="cmr-12">for details </span><span class="cite"><span
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class="cmr-12">[</span><a
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href="userhtmlli5.html#XPSBLASGUIDE"><span
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class="cmr-12">21</span></a><span
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class="cmr-12">]</span></span><span
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class="cmr-12">.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-5-"><td style="white-space:normal; text-align:left;" id="TBL-12-5-1"
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class="td11"> <!--l. 740--><p class="noindent" ><code class="lstinline"><span style="color:#000000">info</span></code> </td><td style="white-space:normal; text-align:left;" id="TBL-12-5-2"
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class="td11"> <!--l. 740--><p class="noindent" ><code class="lstinline"><span style="color:#000000">integer</span><span style="color:#000000">,</span><span style="color:#000000"> </span><span style="color:#000000">intent</span><span style="color:#000000">(</span><span style="color:#000000">out</span><span style="color:#000000">)</span></code><span
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class="cmr-12">.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-6-"><td style="white-space:normal; text-align:left;" id="TBL-12-6-1"
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class="td11"> <!--l. 741--><p class="noindent" > </td><td style="white-space:normal; text-align:left;" id="TBL-12-6-2"
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class="td11"> <!--l. 741--><p class="noindent" ><span
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class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span
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class="cmr-12"> </span><a
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href="userhtmlse7.html#x28-320007"><span
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class="cmr-12">7</span><!--tex4ht:ref: sec:errors --></a> <span
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class="cmr-12">for details.</span> </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-12-7-"><td style="white-space:normal; text-align:left;" id="TBL-12-7-1"
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class="td11"> </td> </tr></table> </div>
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