Hi Kwankyu, On 2016-08-23, Kwankyu Lee <ekwan...@gmail.com> wrote: > For (1): Joining categories works. However, this seems not a standard nor > an elegant way...
Why not? It is absolutely standard in mathematics to consider objects A that belong to the category of rings and belong at the same time to the category of modules over a ring R. Cheers, Simon -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
