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<head><title>psb_geinv — Entrywise Inversion</title>
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</head><body
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>
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<!--l. 1384--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu24.html" >prev</a>] [<a
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href="userhtmlsu24.html#tailuserhtmlsu24.html" >prev-tail</a>] [<a
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href="userhtmlsu22.html#tailuserhtmlsu25.html">tail</a>] [<a
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href="userhtmlsu12.html#userhtmlsu27.html" >up</a>] </p></div>
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<h4 class="subsectionHead"><span class="titlemark">4.16 </span> <a
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id="x34-710004.16"></a>psb_geinv — Entrywise Inversion</h4>
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<!--l. 1386--><p class="noindent" >This function computes the entrywise inverse of a vector <span
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class="cmmi-10">x </span>and puts it into
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<span
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class="cmmi-10">y</span>
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<center class="math-display" >
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<img
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src="userhtml24x.png" alt="∕ ← 1∕x(i).
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" class="math-display" ></center>
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<!--l. 1388--><p class="nopar" >
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<!--l. 1390--><p class="indent" > <span class="lstinline"></span><span
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class="cmtt-10">psb_geinv</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">y</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><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">flag</span><span
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class="cmtt-10">)</span>
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<div class="table">
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<!--l. 1393--><p class="indent" > <a
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id="x34-71001r16"></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. 1394--><p class="noindent" >
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<div class="tabular"> <table id="TBL-16" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-16-1g"><col
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id="TBL-16-1"><col
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id="TBL-16-2"></colgroup><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-16-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-1-1"
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class="td11"><span
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class="cmmi-10">∕</span>, <span
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class="cmmi-10">x</span>, <span
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class="cmmi-10">y </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-16-1-2"
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class="td11"><span
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class="cmbx-10">Function</span></td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-16-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-1"
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class="td11">Short Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-2"
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class="td11">psb_geinv</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-16-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-2"
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class="td11">psb_geinv</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-16-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-4-1"
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class="td11">Short Precision Complex</td><td style="white-space:nowrap; text-align:left;" id="TBL-16-4-2"
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class="td11">psb_geinv</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-16-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-5-1"
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class="td11">Long Precision Complex </td><td style="white-space:nowrap; text-align:left;" id="TBL-16-5-2"
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class="td11">psb_geinv</td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-16-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-6-1"
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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 16: </span><span
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class="content">Data types</span></div><!--tex4ht:label?: x34-71001r16 -->
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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 vector <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: an object of type <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
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type specified in Table <a
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href="userhtmlsu11.html#x20-57001r2">2<!--tex4ht:ref: tab:f90dot --></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">flag</span> </dt><dd
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class="description">check if any of the <span
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class="cmmi-10">x</span>(<span
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class="cmmi-10">i</span>) = 0, and in case returns error halting the
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computation.<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">optional </span>Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: the logical value <span class="lstinline"></span><span
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class="cmtt-10">flag</span><span
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class="cmtt-10">=.</span><span
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class="cmtt-10">true</span><span
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class="cmtt-10">.</span>
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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">y</span> </dt><dd
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class="description">the local portion of result submatrix <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">out</span>.<br
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class="newline" />Specified as: an object of type <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
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the type indicated in Table <a
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href="#x34-71001r16">16<!--tex4ht:ref: tab:f90inv --></a>.
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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. 1--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu24.html" >prev</a>] [<a
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href="userhtmlsu24.html#tailuserhtmlsu24.html" >prev-tail</a>] [<a
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href="userhtmlsu25.html" >front</a>] [<a
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href="userhtmlsu12.html#userhtmlsu27.html" >up</a>] </p></div>
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<!--l. 1--><p class="indent" > <a
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id="tailuserhtmlsu25.html"></a>
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</body></html>
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