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   <h4 class="subsectionHead"><span class="titlemark"><span 
class="cmr-12">3.5   </span></span> <a 
 id="x13-120003.5"></a><span 
class="cmr-12">Example and test programs</span></h4>
<!--l. 188--><p class="noindent" ><span 
class="cmr-12">The package contains the </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">examples</span></span></span> <span 
class="cmr-12">and </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">tests</span></span></span> <span 
class="cmr-12">directories; both of them are</span>
<span 
class="cmr-12">further divided into </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">fileread</span></span></span> <span 
class="cmr-12">and </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">pdegen</span></span></span> <span 
class="cmr-12">subdirectories. Their purpose is as</span>
<span 
class="cmr-12">follows:</span>
     <dl class="description"><dt class="description">
<span 
class="cmtt-12">examples</span> </dt><dd 
class="description"><span 
class="cmr-12">contains a set of simple example programs with a predefined choice</span>
     <span 
class="cmr-12">of preconditioners, selectable via integer values. These are intended to get</span>
     <span 
class="cmr-12">acquainted with the multilevel preconditioners available in AMG4PSBLAS.</span>
     </dd><dt class="description">
<span 
class="cmtt-12">tests</span> </dt><dd 
class="description"><span 
class="cmr-12">contains a set of more sophisticated examples that will allow the user, via</span>
     <span 
class="cmr-12">the input files in the </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">runs</span></span></span> <span 
class="cmr-12">subdirectories, to experiment with the full range</span>
     <span 
class="cmr-12">of preconditioners implemented in the package.</span></dd></dl>
<!--l. 201--><p class="noindent" ><span 
class="cmr-12">The </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">fileread</span></span></span> <span 
class="cmr-12">directories contain sample programs that read sparse matrices from files,</span>
<span 
class="cmr-12">according to the Matrix Market or the Harwell-Boeing storage format; the </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">pdegen</span></span></span>
<span 
class="cmr-12">programs generate matrices in full parallel mode from the discretization of a sample</span>
<span 
class="cmr-12">partial differential equation.</span>
                                                                               

                                                                               
                                                                               

                                                                               
                                                                               

                                                                               
                                                                               

                                                                               
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