Comment #18 on issue 2848 by pr...@goodok.ru: Failing test in
sympy/solvers/test/test_solvers.py
http://code.google.com/p/sympy/issues/detail?id=2848
For information, I checked these tests on the:
executable: /usr/bin/python (2.6.6-final-0)
architecture: 64-bit
cache: yes
ground types: python
and did not find out the difference with tests (depended of cache), when
use this branch:
https://github.com/sympy/sympy/pull/722
In [1]: from sympy.core.cache import clear_cache
In [2]: simplify(I*pi)
Out[2]: I*pi
In [3]: (pi*I).is_positive
Out[3]: False
In [4]: (I*pi).is_positive
Out[4]: False # True in master
In [5]: clear_cache()
In [6]: e = I*pi
In [7]: e.is_composite
Out[7]: False
In [8]: e.is_positive
Out[8]: False # True in master
In [9]: clear_cache()
In [10]: simplify(I*pi)
Out[10]: I*pi
In [11]: simplify(simplify(log(log(-2)) - log(log(2))))
Out[11]: -log(log(2)) + log(log(2) + I*pi) # log(1 + I*pi/log(2))
in Master
Simultaneously I run IPython in master directory, and I have seen the
dependence of the cache.
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