I opened http://code.google.com/p/sympy/issues/detail?id=2683 for the det() issue. I don't know how to reproduce your other problem, so I can't open any issues for that.
Aaron Meurer On Tue, Sep 6, 2011 at 10:27 AM, Aaron Meurer <[email protected]> wrote: > Hi. > > If you look at the source, it's only being called to see if the matrix > is invertible. But this is unnecessary, because it can just check the > form of the output of rref to determine this. Can you open an issue > for this? Or, you could send in a patch. This should be quite easy > to fix. > > On Mon, Sep 5, 2011 at 2:32 PM, Bryan <[email protected]> wrote: >> Hi all. >> >> When inverting a matrix through gaussian elimination, the det() method >> is called, >> which kills the performance and I think makes little sense as having >> calculated the >> det allows other ways of inverting the matrix and because there are >> other ways of >> noticing if the matrix is non-invertible through gaussian elimination. >> >> Also, it is dying on me due to some error (cannot elevate polynomial >> to negative power), >> but I know that the matrix is invertible. > > This is probably a separate error. What Matrix gives you this error? > Can you open a (separate) issue for this? > > Aaron Meurer > >> >> Is there any good reason to call det() there? >> >> Regards >> >> Bryan >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> 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. >> >> > -- You received this message because you are subscribed to the Google Groups "sympy" group. 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.
