Hi, On 16 July 2011 00:12, Ondrej Certik <ondrej.cer...@gmail.com> wrote:
> On Fri, Jul 15, 2011 at 9:17 AM, Andy Ray Terrel <andy.ter...@gmail.com> > wrote: > > My suggestion would be to continue with the matrixify solution and > > write functions to fix up the expression tree as need be. The whole > > issue of making Add/Mul/Pow extensible is separate but the logic can > > be transferred pretty easily. > > Exactly. Just get the job done, implement the necessary code, and > whether or not Add/Mul/Pow classes can be extended is a separate > issue, and I would suggest not to, to keep things simple in the core, > so that we can refactor once we finish the assumptions refactoring. > btw. Here is my interpretation of matrix expressions: https://github.com/mattpap/sympy/tree/matrix_expr. Currently it doesn't implement matrix expression arithmetic, but most certainly I'm not going to allow a*M or A + B to "doit" by default, rather I will implement this within expand() framework. What I need are semi evaluated matrix expressions, so det(A^T) can be rewritten to det(A), but a*M must remain unevaluated. This branch is very preliminary, there are no tests for the new stuff and I didn't run tests so a few things may be broken > > Ondrej > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to sympy@googlegroups.com. > To unsubscribe from this group, send email to > sympy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > > Mateusz -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
