Hello,
from the 'diff and subs' thread I noticed the following problem with
the division operation:
% ipython
[...]
In [1]: from sympy import *
In [2]: var('x y z')
Out[2]: (x, y, z)
In [3]: v=Matrix(1,2,[x,y])
In [4]: v
Out[4]: [x, y]
In [5]: v/z
Out[5]: [x/z, y/z]
Thats ok, but
In [6]: from __future__ import division
In [7]: v/z
---------------------------------------------------------------------------
<type 'exceptions.TypeError'> Traceback (most recent call last)
/home/friedrich/<ipython console> in <module>()
<type 'exceptions.TypeError'>: unsupported operand type(s) for /: 'Matrix' and
'Symbol'
In [8]: v*(1/z)
Out[8]: [x/z, y/z]
this is not so ideal.
By, Friedrich
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