already reported in https://github.com/sagemath/sage/issues/33327
On Sat, Aug 3, 2024 at 12:02 PM Dima Pasechnik <dimp...@gmail.com> wrote: > > On Sat, Aug 3, 2024 at 11:46 AM Dima Pasechnik <dimp...@gmail.com> wrote: > > > > On Sat, Aug 3, 2024 at 11:19 AM Dima Pasechnik <dimp...@gmail.com> wrote: > > > > > > This probably has to do with the limited capacities of Sage preparser, > > > which converts Sage extensions to the plain Python. > > > It apparently cannot split lines with multiple commands. > > > PRs to improve this welcome. > > > > Oops, no, sorry, my bad. > > It's a bug in the implementation of polynomial rings over QQbar > > (note that there is no error is QQbar is replaced by QQ) > > specifically, in the function _factor_multivariate_polynomial(...) > located in src/sage/rings/qqbar.py > > > > > Dima > > > > > > > > HTH > > > Dima > > > > > > > > > On 3 August 2024 06:58:40 BST, 'Peter Mueller' via sage-devel > > > <sage-devel@googlegroups.com> wrote: > > >> > > >> The line `R.<a, c> = QQbar[]; factor(a^2 - 2*c^2)` raises a > > >> > > >> ValueError: variable name '@c' is not alphanumeric > > >> > > >> while the same line with `c` replaced with `b` works fine. > > >> > > >> This happens in a local installation of Sage 10.4 (and 10.5.beta0), but > > >> also on the SageCell. > > >> > > >> -- Peter Mueller -- 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 on the web visit https://groups.google.com/d/msgid/sage-devel/CAAWYfq174xFVzg8_K_9Z71JOav7O1m6tTv2v1MhxqYixDvd-eQ%40mail.gmail.com.
