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<title>GAP (HomalgToCAS) - Chapter 4: External Rings</title>
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<div class="ChapSects"><a href="chap4.html#X82A8947087082312">4 <span class="Heading">External Rings</span></a>
<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap4.html#X85D85B6C837F4B05">4.1 <span class="Heading">External Rings: Representation</span></a>
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<span class="ContSS"><br /><span class="nocss">  </span><a href="chap4.html#X7D2FB57D87A6B71A">4.1-1 IsHomalgExternalRingRep</a></span>
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<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap4.html#X7C7962B97E6CDFE2">4.2 <span class="Heading">Rings: Constructors</span></a>
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<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap4.html#X7B1D4BD485F406CA">4.3 <span class="Heading">External Rings: Operations and Functions</span></a>
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<h3>4 <span class="Heading">External Rings</span></h3>

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<h4>4.1 <span class="Heading">External Rings: Representation</span></h4>

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<h5>4.1-1 IsHomalgExternalRingRep</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">&#an style='color: green'>8227; IsHomalgExternalRingRep</code>( <var class="Arg">R</var> )</td><td class="tdright">( representation )</td></tr></table></div>
<p>Returns: <code class="code">true</code> or <code class="code">false</code></p>

<p>The internal representation of <strong class="pkg">homalg</strong> rings.</p>

<p>(It is a representation of the <strong class="pkg">GAP</strong> category <code class="code">IsHomalgRing</code>.)</p>

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<h4>4.2 <span class="Heading">Rings: Constructors</span></h4>

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<h4>4.3 <span class="Heading">External Rings: Operations and Functions</span></h4>


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