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<h1 >LinearAlgebraForCAP</h1 >
<h2>Category of Matrices over a Field for CAP</h2>
<p>
2025 .09 -01 </p>
<p>
17 September 2025
</p>
</div >
<p><b>
Sebastian Gutsche
</b>
<br />Email: <span class="URL" ><a href="mailto:sebastian.gutsche@gmail.com" >sebastian.gutsche@gmail.com</a></span >
<br />Homepage: <span class="URL" ><a href="https://sebasguts.github.io/ " >https://sebasguts.github.io/</a></span >
<br />Address : <br />Department Mathematik<br /> Universität Siegen<br /> Walter-Flex-Straße 3 <br /> 57068 Siegen<br /> Germany<br />
</p><p><b>
Sebastian Posur
</b>
<br />Email: <span class="URL" ><a href="mailto:sebastian.posur@uni-muenster.de" >sebastian.posur@uni-muenster.de</a></span >
<br />Homepage: <span class="URL" ><a href="https://sebastianpos.github.io " >https://sebastianpos.github.io</a></span >
<br />Address : <br />Department Mathematik<br /> Universität Siegen<br /> Walter-Flex-Straße 3 <br /> 57068 Siegen<br /> Germany<br />
</p><p><b>
Fabian Zickgraf
</b>
<br />Email: <span class="URL" ><a href="mailto:f.zickgraf@dashdos.com" >f.zickgraf@dashdos.com</a></span >
<br />Homepage: <span class="URL" ><a href="https://github.com/zickgraf/ " >https://github.com/zickgraf/</a></span >
<br />Address : <br />Walter-Flex-Str. 3 <br /> 57068 Siegen<br /> Germany<br />
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<div class="contents" >
<h3>Contents<a id="contents" name="contents" ></a></h3>
<div class="ContChap" ><a href="chap1_mj.html#X79A2BF518637FFB7" >1 <span class="Heading" >Category of Matrices</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap1_mj.html#X86EC0F0A78ECBC10" >1 .1 <span class="Heading" >Constructors</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X79D9727280354457" >1 .1 -1 MatrixCategory</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7C6DB0457A656406" >1 .1 -2 VectorSpaceMorphism</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7EB162887B8F8708" >1 .1 -3 VectorSpaceObject</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X818AE01E7C9D21A5" >1 .1 -4 MatrixCategoryObject</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7A0CAF7F7CE754E7" >1 .1 -5 MatrixCategory_as_CategoryOfRows</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap1_mj.html#X7C701DBF7BAE649A" >1 .2 <span class="Heading" >Attributes</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7A25998E79499AE8" >1 .2 -1 UnderlyingFieldForHomalg</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X8513433F7DA84E66" >1 .2 -2 UnderlyingMatrix</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X83D0E5BD8763C8FD" >1 .2 -3 UnderlyingFieldForHomalg</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X81C6A5F382A1D4F5" >1 .2 -4 Dimension</a></span >
</div ></div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap1_mj.html#X7D03633A7D98026B" >1 .3 <span class="Heading" >GAP Categories</span ></a>
</span >
<div class="ContSSBlock" >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7DAEE1D67CDFA35A" >1 .3 -1 IsVectorSpaceMorphism</a></span >
<span class="ContSS" ><br /><span class="nocss" > </span ><a href="chap1_mj.html#X7EF7321D794F9050" >1 .3 -2 IsVectorSpaceObject</a></span >
</div ></div >
</div >
<div class="ContChap" ><a href="chap2_mj.html#X7967FE8E7BBDF485" >2 <span class="Heading" >Examples and Tests</span ></a>
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X8104A77D7B5CCD4F" >2 .1 <span class="Heading" >Basic Commands</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X78D1062D78BE08C1" >2 .2 <span class="Heading" >Functors</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X85B1F5077BE75340" >2 .3 <span class="Heading" >Solving (Homogeneous) Linear Systems</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X852F59737EC57965" >2 .4 <span class="Heading" >Homology object </span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X7CDB7FF27D734D2D" >2 .5 <span class="Heading" >Liftable</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X797080CE873BB56D" >2 .6 <span class="Heading" >Monoidal structure</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X8218390A785F1EDB" >2 .7 <span class="Heading" >MorphismFromSourceToPushout and MorphismFromFiberProductToSink</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X84410C637B3C1D0E" >2 .8 <span class="Heading" >Opposite category</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X7F34E29281DF3FCE" >2 .9 <span class="Heading" >PreComposeList and PostComposeList</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X87F5609A7B33C58C" >2 .10 <span class="Heading" >Split epi summand</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X7DCD99628504B810" >2 .11 <span class="Heading" >Kernel</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X7DE20941803BFBD9" >2 .12 <span class="Heading" >FiberProduct</span ></a>
</span >
</div >
<div class="ContSect" ><span class="tocline" ><span class="nocss" > </span ><a href="chap2_mj.html#X8245BF297DF9A3E7" >2 .13 <span class="Heading" >WrapperCategory</span ></a>
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