Hi Jonas, On 2014-08-27, Jonas Jermann <jjerma...@gmail.com> wrote: > All in all the pushout construction is rather complicated (there > are many cases/situations) and when implementing new spaces > one probably (unfortunately) has to look at the source / specific > implementation of pushout in detail to ensure everything works > appropriately in all cases.
That's why construction functors are so rarely used. There are only 15 of them, including the SubspaceFunctor that should better be removed. Said in different words: The pushout construction is so complicated, since its *only* use case are complicated coercions situations. In all other situations, where the construction of a new parent is not needed, "simple" tools such as .register_coercion(), .register_embedding() and ._coerce_map_from_() are fully sufficient. Best regards, 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 http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
