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<div class="chlinkprevnexttop"> <a href="chap0_mj.html">[Top of Book]</a>   <a href="chap0_mj.html#contents">[Contents]</a>    <a href="chap14_mj.html">[Previous Chapter]</a>    <a href="chap16_mj.html">[Next Chapter]</a>   </div>

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<p><a id="X7EA29B7D7BA60F42" name="X7EA29B7D7BA60F42"></a></p>
<div class="ChapSects"><a href="chap15_mj.html#X7EA29B7D7BA60F42">15 <span class="Heading">Terminal category</span></a>
<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap15_mj.html#X7D03633A7D98026B">15.1 <span class="Heading"><strong class="pkg">GAP</strong> Categories</span></a>
</span>
<div class="ContSSBlock">
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X8665012E7D503742">15.1-1 IsCapTerminalCategoryWithSingleObject</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X7F48DB947BDA1232">15.1-2 IsObjectInCapTerminalCategoryWithSingleObject</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X86041A8F851354DB">15.1-3 IsMorphismInCapTerminalCategoryWithSingleObject</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X85A149A17E45806B">15.1-4 IsCapTerminalCategoryWithMultipleObjects</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X8751E72879CE707D">15.1-5 IsObjectInCapTerminalCategoryWithMultipleObjects</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X7BC47E5D7AD51588">15.1-6 IsMorphismInCapTerminalCategoryWithMultipleObjects</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X8724DDA281946BEB">15.1-7 IsTerminalCategory</a></span>
</div></div>
<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap15_mj.html#X86EC0F0A78ECBC10">15.2 <span class="Heading">Constructors</span></a>
</span>
<div class="ContSSBlock">
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X7D7044AA82764329">15.2-1 TerminalCategoryWithSingleObject</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X7CBD1E9B81BBFFC8">15.2-2 TerminalCategoryWithMultipleObjects</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X81FA767C792670A2">15.2-3 CAP_INTERNAL_CONSTRUCTOR_FOR_TERMINAL_CATEGORY</a></span>
</div></div>
<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap15_mj.html#X7C701DBF7BAE649A">15.3 <span class="Heading">Attributes</span></a>
</span>
<div class="ContSSBlock">
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X7C2B3F018386B9D4">15.3-1 TerminalCategoryWithSingleObjectUniqueObject</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X87F66FAD7A1100C7">15.3-2 TerminalCategoryWithSingleObjectUniqueMorphism</a></span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap15_mj.html#X80813F9A86FCCC24">15.3-3 FunctorFromTerminalCategory</a></span>
</div></div>
</div>

<h3>15 <span class="Heading">Terminal category</span></h3>

<p><a id="X7D03633A7D98026B" name="X7D03633A7D98026B"></a></p>

<h4>15.1 <span class="Heading"><strong class="pkg">GAP</strong> Categories</span></h4>

<p><a id="X8665012E7D503742" name="X8665012E7D503742"></a></p>

<h5>15.1-1 IsCapTerminalCategoryWithSingleObject</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsCapTerminalCategoryWithSingleObject</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of a terminal category with a single object.</p>

<p><a id="X7F48DB947BDA1232" name="X7F48DB947BDA1232"></a></p>

<h5>15.1-2 IsObjectInCapTerminalCategoryWithSingleObject</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsObjectInCapTerminalCategoryWithSingleObject</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of an object in a terminal category with a single object.</p>

<p><a id="X86041A8F851354DB" name="X86041A8F851354DB"></a></p>

<h5>15.1-3 IsMorphismInCapTerminalCategoryWithSingleObject</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsMorphismInCapTerminalCategoryWithSingleObject</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of a morphism in a terminal category with a single object.</p>

<p><a id="X85A149A17E45806B" name="X85A149A17E45806B"></a></p>

<h5>15.1-4 IsCapTerminalCategoryWithMultipleObjects</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsCapTerminalCategoryWithMultipleObjects</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of a terminal category with multiple objects.</p>

<p><a id="X8751E72879CE707D" name="X8751E72879CE707D"></a></p>

<h5>15.1-5 IsObjectInCapTerminalCategoryWithMultipleObjects</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsObjectInCapTerminalCategoryWithMultipleObjects</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of an object in a terminal category with multiple objects.</p>

<p><a id="X7BC47E5D7AD51588" name="X7BC47E5D7AD51588"></a></p>

<h5>15.1-6 IsMorphismInCapTerminalCategoryWithMultipleObjects</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsMorphismInCapTerminalCategoryWithMultipleObjects</code>( <var class="Arg">T</var> )</td><td class="tdright">( filter )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The <strong class="pkg">GAP</strong> type of a morphism in a terminal category with multiple objects.</p>

<p><a id="X8724DDA281946BEB" name="X8724DDA281946BEB"></a></p>

<h5>15.1-7 IsTerminalCategory</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ IsTerminalCategory</code>( <var class="Arg">C</var> )</td><td class="tdright">( property )</td></tr></table></div>
<p>Returns: <code class="keyw">true</code> or <code class="keyw">false</code></p>

<p>The property of the category <var class="Arg">C</var> being terminal.</p>

<p><a id="X86EC0F0A78ECBC10" name="X86EC0F0A78ECBC10"></a></p>

<h4>15.2 <span class="Heading">Constructors</span></h4>

<p><a id="X7D7044AA82764329" name="X7D7044AA82764329"></a></p>

<h5>15.2-1 TerminalCategoryWithSingleObject</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ TerminalCategoryWithSingleObject</code>( <var class="Arg">arg</var> )</td><td class="tdright">( function )</td></tr></table></div>
<p>Construct a terminal category with a single object.</p>

<p><a id="X7CBD1E9B81BBFFC8" name="X7CBD1E9B81BBFFC8"></a></p>

<h5>15.2-2 TerminalCategoryWithMultipleObjects</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ TerminalCategoryWithMultipleObjects</code>( <var class="Arg">arg</var> )</td><td class="tdright">( function )</td></tr></table></div>
<p>Construct a terminal category with multiple objects.</p>

<p><a id="X81FA767C792670A2" name="X81FA767C792670A2"></a></p>

<h5>15.2-3 CAP_INTERNAL_CONSTRUCTOR_FOR_TERMINAL_CATEGORY</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ CAP_INTERNAL_CONSTRUCTOR_FOR_TERMINAL_CATEGORY</code>( <var class="Arg">options</var> )</td><td class="tdright">( function )</td></tr></table></div>
<p>Returns: a <strong class="pkg">CAP</strong> category</p>

<p>This function takes a record of options suited for CategoryConstructor. It makes common adjustments for TerminalCategoryWithSingleObject and TerminalCategoryWithMultipleObjects to the list of operations to install and the categorical properties of the given record, before passing it on to CategoryConstructor.</p>

<p><a id="X7C701DBF7BAE649A" name="X7C701DBF7BAE649A"></a></p>

<h4>15.3 <span class="Heading">Attributes</span></h4>

<p><a id="X7C2B3F018386B9D4" name="X7C2B3F018386B9D4"></a></p>

<h5>15.3-1 TerminalCategoryWithSingleObjectUniqueObject</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ TerminalCategoryWithSingleObjectUniqueObject</code>( <var class="Arg">arg</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a <strong class="pkg">CAP</strongobject</p>

<p>The unique object in a terminal category with a single object.</p>

<p><a id="X87F66FAD7A1100C7" name="X87F66FAD7A1100C7"></a></p>

<h5>15.3-2 TerminalCategoryWithSingleObjectUniqueMorphism</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ TerminalCategoryWithSingleObjectUniqueMorphism</code>( <var class="Arg">arg</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a <strong class="pkg">CAP</strong> morphism</p>

<p>The unique morphism in a terminal category with a single object.</p>

<p><a id="X80813F9A86FCCC24" name="X80813F9A86FCCC24"></a></p>

<h5>15.3-3 FunctorFromTerminalCategory</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ FunctorFromTerminalCategory</code>( <var class="Arg">object</var> )</td><td class="tdright">( attribute )</td></tr></table></div>
<p>Returns: a <strong class="pkg">CAP</strong> functor</p>

<p>A functor from <code class="code">AsCapCategory( TerminalObject( CapCat ) )</code> mapping the unique object to <var class="Arg">object</var>.</p>


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