Re: [sage-combinat-devel] Re: Overriding cartesian_product

2011-03-04 Thread Nicolas M. Thiery
On Fri, Mar 04, 2011 at 02:44:06AM -0800, Volker Braun wrote: >One problem is that we don't have toric morphisms implemented yet (Though >the convex geometry FanMorphism is done). Partly because I have no idea >how the category framework should be used to implement them. So we can't >

Re: [sage-combinat-devel] Re: Overriding cartesian_product

2011-03-04 Thread Volker Braun
One problem is that we don't have toric morphisms implemented yet (Though the convex geometry FanMorphism is done). Partly because I have no idea how the category framework should be used to implement them. So we can't implement the summand_projection yet. Is there anything wrong with just over

Re: [sage-combinat-devel] Re: Overriding cartesian_product

2011-03-04 Thread Nicolas M. Thiery
On Thu, Mar 03, 2011 at 06:38:57PM -0800, Andrey Novoseltsev wrote: > There was a short discussion about it some time ago: > http://groups.google.com/group/sage-devel/browse_thread/thread/7123d76d7f2d0519/e0423cb0b000526f > with William stating that we do consider schemes as sets in Sage. Ok. If,

[sage-combinat-devel] Re: Overriding cartesian_product

2011-03-03 Thread Andrey Novoseltsev
Hi Nicolas, On Mar 3, 6:44 am, "Nicolas M. Thiery" wrote: >         Hi Andrey, > > On Wed, Mar 02, 2011 at 09:56:45AM -0800, Andrey Novoseltsev wrote: > > I would appreciate some input on the following ticket > >http://trac.sagemath.org/sage_trac/ticket/10809 > > which constructs Cartesian produc