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<TitlePage>
<Title>
Digraphs
</Title>
<Subtitle>
Graphs, digraphs, and multidigraphs in &GAP;
</Subtitle>
<Version>
1.13.1
</Version>
<Author>
Jan De Beule<Alt Only="LaTeX"><Br/></Alt>
<Address>
Vrije Universiteit Brussel, Vakgroep Wiskunde, Pleinlaan 2, B - 1050 Brussels, Belgium<Br/>
</Address>
<Email>jdebeule@cage.ugent.be</Email>
<Homepage>https://researchportal.vub.be/en/persons/jan-de-beule</Homepage>
</Author>
<Author>
Julius Jonusas<Alt Only="LaTeX"><Br/></Alt>
<Email>j.jonusas@gmail.com</Email>
<Homepage>http://julius.jonusas.work</Homepage>
</Author>
<Author>
James Mitchell<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>jdm3@st-andrews.ac.uk</Email>
<Homepage>https://jdbm.me</Homepage>
</Author>
<Author>
Wilf A. Wilson<Alt Only="LaTeX"><Br/></Alt>
<Email>gap@wilf-wilson.net</Email>
<Homepage>https://wilf.me</Homepage>
</Author>
<Author>
Michael Young<Alt Only="LaTeX"><Br/></Alt>
<Address>
Jack Cole Building, North Haugh, St Andrews, Fife, KY16 9SX, Scotland<Br/>
</Address>
<Email>mct25@st-andrews.ac.uk</Email>
<Homepage>https://myoung.uk/work/</Homepage>
</Author>
<Author>
Marina Anagnostopoulou-Merkouri<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>mam49@st-andrews.ac.uk</Email>
</Author>
<Author>
Finn Buck<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>finneganlbuck@gmail.com</Email>
</Author>
<Author>
Stuart Burrell<Alt Only="LaTeX"><Br/></Alt>
<Email>stuartburrell1994@gmail.com</Email>
<Homepage>https://stuartburrell.github.io</Homepage>
</Author>
<Author>
Graham Campbell<Alt Only="LaTeX"><Br/></Alt>
</Author>
<Author>
Reinis Cirpons<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>rc234@st-andrews.ac.uk</Email>
</Author>
<Author>
Ashley Clayton<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>ac323@st-andrews.ac.uk</Email>
</Author>
<Author>
Tom Conti-Leslie<Alt Only="LaTeX"><Br/></Alt>
<Email>tom.contileslie@gmail.com</Email>
<Homepage>https://tomcontileslie.com</Homepage>
</Author>
<Author>
Joseph Edwards<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>jde1@st-andrews.ac.uk</Email>
<Homepage>https://github.com/Joseph-Edwards</Homepage>
</Author>
<Author>
Harry Jack<Alt Only="LaTeX"><Br/></Alt>
<Email>hrj4@st-andrews.ac.uk</Email>
</Author>
<Author>
Christopher Jefferson<Alt Only="LaTeX"><Br/></Alt>
<Address>
Jack Cole Building, North Haugh, St Andrews, Fife, KY16 9SX, Scotland<Br/>
</Address>
<Email>caj21@st-andrews.ac.uk</Email>
<Homepage>https://heather.cafe/</Homepage>
</Author>
<Author>
Kamran Sharma<Alt Only="LaTeX"><Br/></Alt>
<Address>
Jack Cole Building, North Haugh, St Andrews, Fife, KY16 9SX, Scotland<Br/>
</Address>
<Email>kks4@st-andrews.ac.uk</Email>
</Author>
<Author>
Finn Smith<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>fls3@st-andrews.ac.uk</Email>
</Author>
<Author>
Ben Spiers<Alt Only="LaTeX"><Br/></Alt>
<Email>bspiers972@outlook.com</Email>
</Author>
<Author>
Maria Tsalakou<Alt Only="LaTeX"><Br/></Alt>
<Address>
Mathematical Institute, North Haugh, St Andrews, Fife, KY16 9SS, Scotland<Br/>
</Address>
<Email>mt200@st-andrews.ac.uk</Email>
<Homepage>https://mariatsalakou.github.io/</Homepage>
</Author>
<Date>
27 September 2025
</Date>
<Abstract>
The &Digraphs; package is a &GAP; package containing
methods for graphs, digraphs, and multidigraphs.
</Abstract>
<Copyright>
Jan De Beule, Julius Jonušas, James D. Mitchell,
Wilf A. Wilson, Michael Young et al.<P/>
&Digraphs; is free software; you can redistribute it and/or modify
it under the terms of the <URL Text="GNU General Public License"> https://www.fsf.org/licenses/gpl.html</URL> as published by the
Free Software Foundation; either version 3 of the License, or (at
your option) any later version.
</Copyright>
<Acknowledgements>
We would like to thank Christopher Jefferson for his help in including
&BLISS; in &Digraphs;.
We also gratefully acknowledge the encouragement and assistance of
Leonard Soicher, and the inspiration of his &GRAPE; package, at many
points throughout the development of &Digraphs;.
This package's methods for computing digraph homomorphisms are based
on work by Max Neunhöffer, and independently Artur Schäfer.
</Acknowledgements>
</TitlePage>
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