Comment #6 on issue 1562 by mattpap: Have trigsimp apply factor and Poly.cancel() to sin's and cos's http://code.google.com/p/sympy/issues/detail?id=1562
OK, I misunderstood you. Here you touch a much more general problem of how should the (an) internal representation of expressions look like (mainly what should be stored in `args` and how they should be accessed, which is currently messed up. As long as you play with core classes everything should be fine. Some classes, however, make things complicated by storing non-Basic elements in `args`. Poly, Integral, Sum are good examples of violation of some rules (I say some rules because I can't recall if there was any design specification how to play with `args`, e.g. there is function `iter_basic_args` for convenience but it isn't implemented everywhere, where it should be. So for now new Poly don't mess with `args` at all, but this will solve the problem only temporarily (really it hides it). > I think we should make RootOf to be more of a user class Perfectly agree. Current version of RootOf is a very naive implementation, just for completeness, rather for real usage. Much more care must be put to make this class useful for day-to-day work. I don't like to play with rootfinding code, so it's the only thing not touched at all in new implementation of polys. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
