Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium Series WrongResult
New issue 3912 by [email protected]: Order terms don't cancel correctly
http://code.google.com/p/sympy/issues/detail?id=3912
In [10]: O(x) - O(x)
Out[10]: O(x)
In [11]: O(1/x) - O(1/x)
Out[11]:
⎛1⎞
O⎜─⎟
⎝x⎠
In [12]: O(1/x) + O(1)
Out[12]:
⎛1⎞
O⎜─⎟
⎝x⎠
In [13]: O(x) + O(1)
Out[13]: O(1)
If I have my math correctly, the O(1/x) - O(1/x) one should give O(1),
since things could cancel. If I have it backwards, it's the other one.
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