> What if either argument is something like x - y or y - x? Would those both be canonicalized to the same thing (with either choice)?
> > I meant using expand_func with option b. > Of course, my fault. In [8]: legendre(n, y-x) Out[8]: legendre(n, -x + y) In [9]: expand_func(_) Out[9]: (-1)**n*legendre(n, x - y) The results is the same, but this is obvious, we use the very same expansion code, just at different locations in the class. -- You received this message because you are subscribed to the Google Groups "sympy" group. To view this discussion on the web visit https://groups.google.com/d/msg/sympy/-/NfyboDS_VaIJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
