<p>This is the manual for the <strong class="pkg">AGT</strong> package version 0.3.1, developed at Queen Mary University of London by Rhys J. Evans.</p>
<p>The <strong class="pkg">AGT</strong> package contains a methods used for the determination of various algebraic and regularity properties of graphs, as well as certain substructures of graphs. The package also contains a library of strongly regular graphs, intended to be a useful resource for computational experiments.</p>
<p>All of the functions in this package deal with finite simple graphs in <strong class="pkg">Grape</strong> format <a href="chapBib_mj.html#biBGRAPE_2018">[Soi18]</a>. Behind the scenes, we also use the <strong class="pkg">Digraphs</strong> package <a href="chapBib_mj.html#biBDIGRAPHS_2019">[DBJM+19]</a> to format and efficiently store and access the graphs in the strongly regular graph library.</p>
<p>To install the <strong class="pkg">AGT</strong> package, you will need to download the most recent <code class="code">tar.gz</code> file, found at https://gap-packages.github.io/agt/. Once downloaded, you can install the package by following the instructions found in the <strong class="pkg">GAP</strong> reference manual, <span class="URL"><a href="https://docs.gap-system.org/doc/ref/chap76.html">chapter 76</a></span>.</p>
<p>The <strong class="pkg">AGT</strong> package requires the following <strong class="pkg">GAP</strong> packages:</p>
<ul>
<li><p><strong class="pkg">GAPDoc</strong> <a href="chapBib_mj.html#biBGAPDOC_2019">[LN19]</a>, version 1.6 or higher;</p>
</li>
<li><p><strong class="pkg">DESIGN</strong> <a href="chapBib_mj.html#biBDESIGN_2019">[Soi19]</a>, version 1.7 or higher;</p>
</li>
<li><p><strong class="pkg">GRAPE</strong> <a href="chapBib_mj.html#biBGRAPE_2018">[Soi18]</a>, version 4.8 or higher;</p>
</li>
<li><p><strong class="pkg">Digraphs</strong> <a href="chapBib_mj.html#biBDIGRAPHS_2019">[DBJM+19]</a>, version 0.12.2 or higher.</p>
</li>
</ul>
<p>Each of the above packages are part of the standard <strong class="pkg">GAP</strong> distribution.</p>
<p>Once correctly installed, you can load the <strong class="pkg">AGT</strong> package at the <strong class="pkg">GAP</strong> prompt by typing the following.</p>
<p>If you use the <strong class="pkg">AGT</strong> package in your research, please tell us about it by emailing <span class="URL"><a href="mailto:r.evans@qmul.ac.uk">r.evans@qmul.ac.uk</a></span>. We are interested in any research involving the use of the <strong class="pkg">AGT</strong> package and might refer to your work in the future. If you wish to refer to the <strong class="pkg">AGT</strong> package in a published work, please cite <strong class="pkg">AGT</strong> like a journal article. The following is a BibTeX entry for the current <strong class="pkg">AGT</strong> version:</p>
<div class="example"><pre>
@Manual{agt,
author = {Evans, Rhys J.},
key = {agt}, title = {{AGT -- Algebraic Graph Theory package for GAP, Version 0.3.1}},
url = {\verb+(https://gap-packages.github.io/agt/)+},
year = {2020}
</pre></div>
<h4>1.4 <span class="Heading">Examples of the use of <strong class="pkg">AGT</strong></span></h4>
<p>We will give a simple example of how to use the <strong class="pkg">AGT</strong> package here. Further applications of the package can be found in <a href="chapBib_mj.html#biBE_2020">[Eva20]</a>. In this example, we will examine the properties and subgraphs of the strongly regular graphs with parameters <span class="SimpleMath">\((16,6,2,2)\)</span>.</p>
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