On May 18, 2:44 pm, benjamin antieau <d.ben.anti...@gmail.com> wrote: > Oh, and this is also the case over other base rings, like over GF(p). > > On May 18, 2:43 pm, benjamin antieau <d.ben.anti...@gmail.com> wrote: > > > > > I noticed the following incorrect behavior. > > > sage: C=simplicial_complexes.ChessboardComplex(3,3).chain_complex() > > sage: C.category() > > Category of chain complexes over Integer Ring > > sage: A=C.category() > > sage: A.is_abelian() > > False > > > As far as I can tell ChainComplexes inherits is_abelian from > > AbelianCategory, so I don't know what the problem is. > > > class ChainComplexes(Category_module): > > class Category_module(Category_over_base_ring, AbelianCategory): > > class AbelianCategory: > > def is_abelian(self): > > return True
The problem is not just chain complexes: sage: RingModules(ZZ).is_abelian() False --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
