Groupoid¶
- class sage.categories.groupoid.Groupoid(G=None)[source]¶
- Bases: - CategoryWithParameters- The category of groupoids, for a set (usually a group) \(G\). - FIXME: - Groupoid or Groupoids ? 
- definition and link with Wikipedia article Groupoid 
- Should Groupoid inherit from Category_over_base? 
 - EXAMPLES: - sage: Groupoid(DihedralGroup(3)) Groupoid with underlying set Dihedral group of order 6 as a permutation group - >>> from sage.all import * >>> Groupoid(DihedralGroup(Integer(3))) Groupoid with underlying set Dihedral group of order 6 as a permutation group - classmethod an_instance()[source]¶
- Return an instance of this class. - EXAMPLES: - sage: Groupoid.an_instance() # indirect doctest Groupoid with underlying set Symmetric group of order 8! as a permutation group - >>> from sage.all import * >>> Groupoid.an_instance() # indirect doctest Groupoid with underlying set Symmetric group of order 8! as a permutation group