\BOOKMARK [0][-]{chapter.1}{Introduction}{}% 1
\BOOKMARK [0][-]{chapter.2}{2d-groups : crossed modules and cat1-groups}{}% 2
\BOOKMARK [1][-]{section.2.1}{Constructions for crossed modules}{chapter.2}% 3
\BOOKMARK [1][-]{section.2.2}{Pre-crossed modules}{chapter.2}% 4
\BOOKMARK [1][-]{section.2.3}{Cat1-groups and pre-cat1-groups}{chapter.2}% 5
\BOOKMARK [1][-]{section.2.4}{Selection of a small cat1-group}{chapter.2}% 6
\BOOKMARK [1][-]{section.2.5}{More functions for crossed modules and cat1-groups}{chapter.2}% 7
\BOOKMARK [0][-]{chapter.3}{2d-mappings}{}% 8
\BOOKMARK [1][-]{section.3.1}{Morphisms of 2d-groups}{chapter.3}% 9
\BOOKMARK [1][-]{section.3.2}{Morphisms of pre-crossed modules}{chapter.3}% 10
\BOOKMARK [1][-]{section.3.3}{Morphisms of pre-cat1-groups}{chapter.3}% 11
\BOOKMARK [1][-]{section.3.4}{Operations on morphisms}{chapter.3}% 12
\BOOKMARK [0][-]{chapter.4}{Isoclinism of groups and crossed modules}{}% 13
\BOOKMARK [1][-]{section.4.1}{More operations for crossed modules}{chapter.4}% 14
\BOOKMARK [1][-]{section.4.2}{Isoclinism for groups}{chapter.4}% 15
\BOOKMARK [1][-]{section.4.3}{Isoclinism for crossed modules}{chapter.4}% 16
\BOOKMARK [0][-]{chapter.5}{Derivations and Sections}{}% 17
\BOOKMARK [1][-]{section.5.1}{Whitehead Multiplication}{chapter.5}% 18
\BOOKMARK [1][-]{section.5.2}{Whitehead Groups and Monoids}{chapter.5}% 19
\BOOKMARK [0][-]{chapter.6}{Actors of 2d-groups}{}% 20
\BOOKMARK [1][-]{section.6.1}{Actor of a crossed module}{chapter.6}% 21
\BOOKMARK [0][-]{chapter.7}{Induced constructions}{}% 22
\BOOKMARK [1][-]{section.7.1}{Induced crossed modules}{chapter.7}% 23
\BOOKMARK [0][-]{chapter.8}{Crossed squares and their morphisms}{}% 24
\BOOKMARK [1][-]{section.8.1}{Constructions for crossed squares}{chapter.8}% 25
\BOOKMARK [1][-]{section.8.2}{Morphisms of crossed squares}{chapter.8}% 26
\BOOKMARK [0][-]{chapter.9}{Crossed modules of groupoids}{}% 27
\BOOKMARK [1][-]{section.9.1}{Constructions for crossed modules of groupoids}{chapter.9}% 28
\BOOKMARK [0][-]{chapter.10}{Utility functions}{}% 29
\BOOKMARK [1][-]{section.10.1}{Inclusion and Restriction Mappings}{chapter.10}% 30
\BOOKMARK [1][-]{section.10.2}{Abelian Modules}{chapter.10}% 31
\BOOKMARK [0][-]{chapter.11}{Development history}{}% 32
\BOOKMARK [1][-]{section.11.1}{Changes from version to version}{chapter.11}% 33
\BOOKMARK [1][-]{section.11.2}{Versions for GAP [4.5 .. 4.8]}{chapter.11}% 34
\BOOKMARK [1][-]{section.11.3}{What needs doing next?}{chapter.11}% 35
\BOOKMARK [0][-]{chapter*.5}{References}{}% 36
\BOOKMARK [0][-]{section*.6}{Index}{}% 37
