Special operations defined for morphisms of cat1-groups are stored in
the record structure Cat1MorphismOps which is based on MappingOps.
Every morphism of cat1-groups mor has field mor.operations set
equal to Cat1MorphismOps;.
gap> IsMonomorphism( mu );
true
gap> IsEpimorphism( mu );
false
gap> IsIsomorphism( mu );
false
gap> IsEndomorphism( mu );
false
gap> IsAutomorphism( mu );
false
GAP 3.4.4