On 3 June 2011 09:37, Andrew Mathas <andrew.mat...@gmail.com> wrote: > > > On Jun 3, 6:22 am, "Nicolas M. Thiery" <nicolas.thi...@u-psud.fr> > wrote: > > Hi Andrew, Paul, > > > > There is a potential ambiguity, so let me ask to make sure. Paul: in > > your use case, the multi partitions are all of the same length (say > > n), and are sorted for the *simultaneous* action of the symmetric > > group S_n on all partitions, right? E.g. a typical example is: > > > > [ [ 2,1,1,1,1 ] > > [ 1,2,1,1,1 ] ] > > > > Andrew: is this what you want to manipulate? Or are you interested in > > objects like: > > > > [ [2,1,1,1], [2,1], [3,2,2,2] ] > > Hi Nicolas, > > I just looked at Paul's patch and, of course, you are right. My > objects index the conjugacy classes of the wreath product of a finite > cyclic group with the symmetric group. I would call Paul's object > mulicompositions. Given this ambiguity I should stick with > PartitionTuples. > > Andrew > > The naming here is I think not entirely consistent in the literature, the term multi-partite partitions also pops up. And then multi-symmetric functions may me different things too. I should have looked a bit closer at what you had written. Nevertheless, from my limited understanding both ideas are related and maybe could share some code.
> > > > By the way, Paul: I owe you an apology for not having yet looked at > > your code. Basically, I did not need it right away ... I still think > > that this would be a very useful and natural addition to Sage. Please > > get in touch with Emmanuel to get a mathematic review. And please, > > someone, take over the review from me! > Nicolas, there's no need to apologize. I've been working on entirely unrelated areas and haven't looked at the code for months anyway. I will try to get something up and running for (what I'm calling) multi-partitions and multi-symmetric functions/polynomial. Perhaps we'll need to sort out the naming at some point, but I can easily change it later as needed. I'll get in touch with Emmanuel also. Cheers, Paul. -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
