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<head><title>psb_geamaxs — Generalized Infinity Norm</title>
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</head><body
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>
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<!--l. 417--><div class="crosslinks"><p class="noindent">[<a
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<h4 class="subsectionHead"><span class="titlemark">4.5 </span> <a
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id="x23-600004.5"></a>psb_geamaxs — Generalized Infinity Norm</h4>
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<!--l. 419--><p class="noindent" >This subroutine computes a series of infinity norms on the columns of a dense matrix
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<span
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class="cmmi-10">x</span>:
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<center class="math-display" >
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<img
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src="userhtml7x.png" alt="res(i) ← makx|x(k,i)|
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" class="math-display" ></center>
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<!--l. 421--><p class="nopar" >
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<!--l. 423--><p class="indent" > <span class="lstinline"></span><span
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class="cmtt-10">call</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">psb_geamaxs</span><span
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class="cmtt-10">(</span><span
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class="cmtt-10">res</span><span
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class="cmtt-10">,</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">x</span><span
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class="cmtt-10">,</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">desc_a</span><span
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class="cmtt-10">,</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">info</span><span
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class="cmtt-10">)</span>
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<div class="table">
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<!--l. 425--><p class="indent" > <a
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id="x23-60001r5"></a><hr class="float"><div class="float"
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>
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<div class="center"
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>
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<!--l. 426--><p class="noindent" >
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<div class="tabular"> <table id="TBL-5" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-5-1g"><col
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id="TBL-5-1"><col
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id="TBL-5-2"><col
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id="TBL-5-3"></colgroup><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-5-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-1-1"
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class="td11"><span
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class="cmmi-10">res </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-1-2"
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class="td11"><span
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class="cmmi-10">x </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-5-1-3"
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class="td11"><span
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class="cmbx-10">Subroutine </span></td></tr><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-5-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-1"
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class="td11">Short Precision Real</td><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-2"
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class="td11">Short Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-3"
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class="td11">psb_geamaxs</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-5-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-2"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-3"
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class="td11">psb_geamaxs</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-5-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-1"
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class="td11">Short Precision Real</td><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-2"
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class="td11">Short Precision Complex</td><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-3"
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class="td11">psb_geamaxs</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-5-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-5-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-5-2"
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class="td11">Long Precision Complex </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-5-3"
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class="td11">psb_geamaxs</td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-5-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-6-1"
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class="td11"> </td></tr></table></div></div>
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<br /> <div class="caption"
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><span class="id">Table 5: </span><span
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class="content">Data types</span></div><!--tex4ht:label?: x23-60001r5 -->
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</div><hr class="endfloat" />
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</div>
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">Type:</span> </dt><dd
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class="description">Synchronous.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Entry</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">x</span> </dt><dd
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class="description">the local portion of global dense matrix <span
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class="cmmi-10">x</span>. <br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: a rank one or two array or an object of type
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<a
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href="userhtmlsu7.html#vdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a> containing numbers of type specified in Table <a
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href="#x23-60001r5">5<!--tex4ht:ref: tab:f90mamax --></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">desc</span><span
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class="cmbx-10">_a</span> </dt><dd
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class="description">contains data structures for communications.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an object of type <a
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href="userhtmlsu5.html#descdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_desc</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Return</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">res</span> </dt><dd
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class="description">is the infinity norm of the columns of <span
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class="cmmi-10">x</span>.<br
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class="newline" />Scope: <span
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class="cmbx-10">global </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />Specified as: a number or a rank-one array of long precision real numbers.
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</dd><dt class="description">
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<span
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class="cmbx-10">info</span> </dt><dd
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class="description">Error code.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
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<!--l. 476--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu18.html" >next</a>] [<a
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href="userhtmlsu13.html" >prev</a>] [<a
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href="userhtmlsu13.html#tailuserhtmlsu13.html" >prev-tail</a>] [<a
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href="userhtmlsu14.html" >front</a>] [<a
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href="userhtmlsu12.html#userhtmlsu17.html" >up</a>] </p></div>
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id="tailuserhtmlsu14.html"></a>
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</body></html>
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