On Tue, Mar 26, 2013 at 05:32:22AM -0700, Martin wrote: > Implementing the idea of a GroupAction category would be also of great > help for the species framework! I could then finally properly > implement the remaining constructions, where (if I remember correctly) > I need to specify actions of a Young subgroup on a set. In particular > this concerns unlabelled enumeration of composition. Although one can > do without (as in the original Aldor code), it's ugly.
For whatever it's worth, there is some preliminary stuff in this direction in the queue: http://combinat.sagemath.org/code/file/tip/sage/categories/sets_with_action.py It's more geared toward sets endowed with an action of a semigroup, but the category part should scale to groups. There is also some support for defining actions in sage.categories.action.py; of course the two things should be made to work hand in hand. This seems like a good thing to discuss at Sage Days in June! Cheers, Nicolas -- Nicolas M. Thiéry "Isil" <nthi...@users.sf.net> http://Nicolas.Thiery.name/ -- 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?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
