Updates:
Status: Started
Comment #7 on issue 2151 by [email protected]: BasicMeta.keep_sign
http://code.google.com/p/sympy/issues/detail?id=2151
Most of those failures are trivial (I already fixed most of them in my
local branch). However, there are also some which indicate bugs, e.g.:
In [1]: integrate(sqrt(-x**2 - 4), x)
Out[1]:
⌠
⎮ ⎽⎽⎽⎽⎽⎽⎽⎽⎽
⎮ ╱ 2
⎮ ╲╱ -4 - x dx
⌡
This should be atan(...) + ... (#1304). Or:
_____________ sympy/core/tests/test_expr.py:test_as_ordered_terms
______________
File "/home/mateusz/repo/git/sympy/sympy/core/tests/test_expr.py", line
998, in test_as_ordered_terms
[f(1), f(2), f(3), f(1, 2, 3), g(1), g(2), g(3), g(1, 2, 3)]
AssertionError
This is caching/hashing issue I guess, because the result returned is
actually correct, just == can't handle this properly.
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