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<div class="ChapSects" ><a href="chap4.html#X7B222197819984A6" >4 <span class="Heading" >Ring Maps</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4.html#X7EBF1DD67BD0758F" >4.1 <span class="Heading" >Ring Maps: Attributes</span ></a>
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<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4.html#X7E7A0DE685E23202" >4.1-1 KernelSubobject</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4.html#X82AE604486F48FC4" >4.1-2 KernelEmb</a></span >
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<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap4.html#X7C7401BA7E2221CB" >4.2 <span class="Heading" >Ring Maps: Operations and Functions</span ></a>
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<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap4.html#X870F43DE7DDD85A3" >4.2-1 Kernel</a></span >
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<h3>4 <span class="Heading" >Ring Maps</span ></h3>
<p><a id="X7EBF1DD67BD0758F" name="X7EBF1DD67BD0758F" ></a></p>
<h4>4.1 <span class="Heading" >Ring Maps: Attributes</span ></h4>
<p><a id="X7E7A0DE685E23202" name="X7E7A0DE685E23202" ></a></p>
<h5>4.1-1 KernelSubobject</h5>
<div class="func" ><table class="func" width="100%" ><tr ><td class="tdleft" ><code class="func" >‣ KernelSubobject</code >( <var class="Arg" >phi</var > )</td ><td class="tdright" >( attribute )</td ></tr ></table ></div >
<p>Returns: a <strong class="pkg" >homalg</strong > submodule</p>
<p>The kernel ideal of the ring map <var class="Arg" >phi</var >.</p>
<p><a id="X82AE604486F48FC4" name="X82AE604486F48FC4" ></a></p>
<h5>4.1-2 KernelEmb</h5>
<div class="func" ><table class="func" width="100%" ><tr ><td class="tdleft" ><code class="func" >‣ KernelEmb</code >( <var class="Arg" >phi</var > )</td ><td class="tdright" >( attribute )</td ></tr ></table ></div >
<p>Returns: a <strong class="pkg" >homalg</strong > map </p>
<p>The embedding of the kernel ideal <code class="code" >Kernel</code ><span class="SimpleMath" >(</span ><var class="Arg" >phi</var ><span class="SimpleMath" >)</span > into the <code class="code" >Source </code ><span class="SimpleMath" >(</span ><var class="Arg" >phi</var ><span class="SimpleMath" >)</span >, both viewed as modules over the ring <span class="SimpleMath" >R :=</span ><code class="code" >Source </code ><span class="SimpleMath" >(</span ><var class="Arg" >phi</var ><span class="SimpleMath" >)</span > (cf. <code class="func" >Kernel</code > (<a href="chap4.html#X870F43DE7DDD85A3" ><span class="RefLink" >4.2-1</span ></a>)).</p>
<p><a id="X7C7401BA7E2221CB" name="X7C7401BA7E2221CB" ></a></p>
<h4>4.2 <span class="Heading" >Ring Maps: Operations and Functions</span ></h4>
<p><a id="X870F43DE7DDD85A3" name="X870F43DE7DDD85A3" ></a></p>
<h5>4.2-1 Kernel</h5>
<div class="func" ><table class="func" width="100%" ><tr ><td class="tdleft" ><code class="func" >‣ Kernel</code >( <var class="Arg" >phi</var > )</td ><td class="tdright" >( method )</td ></tr ></table ></div >
<p>Returns: a <strong class="pkg" >homalg</strong > module</p>
<p>The kernel ideal of the ring map <var class="Arg" >phi</var > as an abstract module.</p>
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