Hello,
I just got some results that I belive not beeing expected by the average
user:
In [6]: x = 1/(b*(1/b - b))
In [7]: x.expand()
Out[7]: 1/(b*(-b + 1/b))
I would have expexted
1/(1-b**2) or something like this.
However, if I enter the denominator separately I get the expected result:
In [9]: y = b*(1/b - b)
In [10]: y.expand()
Out[10]: -b**2 + 1
In [13]: sp.__version__
Out[13]: '0.7.1'
Is this the intended behavior? Does it have to do with assumptions?
(The symbol b comes from a plain sp.symbols('a b c d') which is part of
a personal ipython macro)
Best regards,
Bastian.
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