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<!--  manual.xml             Gpd documentation            Chris Wensley  -->
<!--                                                       & Emma Moore  -->
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<!--  $Id: manual.xml,v 1.01 2006/06/01 gap Exp $                        -->
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<?xml version="1.0" encoding="ISO-8859-1"?>
  <!-- $Id: manual.xml,v 1.01  Exp $ -->

<!DOCTYPE Book SYSTEM "gapdoc.dtd"
[<!ENTITY gpd "<Package>Gpd</Package>">] >

<Book Name="Gpd"> 

<TitlePage>
  <Title>&gpd;</Title>
  <Subtitle>Groupoids, graphs of groups, and graphs of groupoids</Subtitle>
  <Version>Version 1.01</Version>

  <Author> Emma Moore 
    <Email>emmajmoore@yahoo.co.uk</Email>
  </Author>
  <Author> Chris Wensley
    <Email>c.d.wensley@bangor.ac.uk</Email>
    <Homepage>http://www.informatics.bangor.ac.uk/~cwensley/</Homepage>
    <Address>
         Department of Mathematics, University of Wales Bangor,<Br/>
      Dean Street, Bangor, Gwynedd, LL57 1UT, U.K.
    </Address>
  </Author>

  <Date>June 2006</Date>

<Abstract>
The &gpd; share package for &GAP;4 provides functions for 
the computation with groupoids (categories with every arrow invertible) 
and their morphisms; for graphs of groups, and graphs of groupoids.
<P/>
It provides normal forms for Free Products with Amalgamation 
and for HNN-extensions when the initial groups have rewrite systems 
and the subgroups have finite index.
<P/>
The &gpd; package was originally implemented in 2000 
(as <Package>GraphGpd</Package>) 
when the first author was studying for a Ph.D. in Bangor.
<P/>
Bug reports, suggestions and comments are, of course, welcome. 
Please contact the second author at     
<Email>c.d.wensley@bangor.ac.uk</Email>.
</Abstract>

<Copyright> 
  &copyright; 2000-2006 by Emma Moore and Chris Wensley <P/>
  We adopt the copyright regulations of &GAP; as detailed in the 
  copyright notice in the &GAP; manual. 
</Copyright>

</TitlePage>

<TableOfContents/>

<Body>

<#Include SYSTEM "intro.xml">
<#Include SYSTEM "gpd.xml">
<#Include SYSTEM "gpdmor.xml">
<#Include SYSTEM "ggraph.xml">
<#Include SYSTEM "history.xml">

</Body>

<Bibliography Databases="manual"/>

<TheIndex/>

</Book>
