Dear all, in the category for `EnumeratedSets` we have methods `rank` and `unrank` that provide a bijection between the set and the natural numbers (or some interval [0,n], if the cardinality is n). These methods are mostly used in the category framework, I think, to provide generic implementations of `random_element` and the like.
Unfortunately, this conflicts with the method `rank` in Posets and WeylGroups, as I realized while adding a test_rank method (which in turn uncovered quite a few bugs). Even though `rank` and `unrank` were introduced very early in the game, I think it would make sense to rename them to something less confusing and deprecate them. I don't think they are used much by users. For example, I think `total_order_rank` and `total_order_unrank` would be OK. I don't think it is wise to rename `Poset.rank` or `WeylGroup.rank`, because these are really extremely standard. We do have `StandardTableau.standard_descents` and `StandardTableau.standard_major_index`, because of an historical accident, and I think it's a pain. However, if very many people think it is better to do `Poset.standard_rank`, than this would also be an option. I am also open to other suggestions, but I really think that these methods should be tested systematically. Martin -- 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 view this discussion visit https://groups.google.com/d/msgid/sage-devel/203c8024-4d5b-46ea-8609-5de51eea2a22n%40googlegroups.com.
