Although, I don't know much about the polynomials module. It may be possible to resolve the problem there without tackling the problem at large.
On Wed, Feb 5, 2014 at 3:29 PM, Matthew Rocklin <[email protected]> wrote: > Unwanted automatic evaluation comes up fairly frequently on the listhost. > It's on our radar but there hasn't been much movement on the issue lately. > It requires a concerted effort by someone with some time. > > > > is there wider interest in such a feature? > Absolutely. > > > On Wed, Feb 5, 2014 at 2:54 PM, Freddie Witherden > <[email protected]>wrote: > >> Hi all, >> >> In SymPy is there any way of stopping orthogonal polynomials from >> automatically simplifying down to concrete expressions? So for: >> >> sy.jacobi_normalized(2, 0, 1, x) >> >> to give: >> >> sqrt(6)/3*jacobi(2, 0, 1, x) >> >> as opposed to: >> >> sqrt(6)*(5*x**2/2 - x - 1/2)/2 >> >> I have a use-case where it is highly desirable for polynomials to be >> kept in the above form (as it permits more efficient/numerically stable >> evaluations later on). Other than keeping n as a Symbol is this >> currently possible? If not---and I suspect, from a quick glance over >> the source code that it isn't!)---is there wider interest in such a >> feature? >> >> Regards, Freddie. >> >> > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
