I would be in favor of having the "sensible" notation, that is, change what is currently in Sage.
With Sage-6.0 coming up there would be a natural transition point. It is easy to have a warning shown the first time that you multiply two permutations and not show it in DOCTEST_MODE. We would then keep the (ill-advised) global variable around, flip the default value, and deprecate it. The warning would tell you that you can use use it for a limited time to switch back to the old behavior. In >1 year we then get rid of that crutch. On Friday, July 12, 2013 7:43:09 PM UTC-4, darijgrinberg wrote: > > While trying to do computations in symmetric group algebras today, I was > shocked by the fact that Sage uses the convention that a product \pi \psi > of two permutations \pi and \psi is the permutation that applies \pi first > and \psi later. > -- 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/groups/opt_out.
