Comment #10 on issue 3135 by [email protected]: Multiple series
expansions
http://code.google.com/p/sympy/issues/detail?id=3135
The output will change if we assume that x->oo and y->oo, right?
Yes, in this case.
So when doing series, is it assumed that both are tending to 0?
Yes.
Also can you explain what is wrong with the order term in the given
example?
In which one? #6, #7, #8 - all correct.
If you about #1, then the answer is: O term is not for symbol
bookkeeping. The only workaround for now: avoid autoevaluation. For
example:
In [3]: Mul(O(x**6), exp(y), evaluate=True)
Out[3]:
⎛ 6⎞
O⎝x ⎠
In [4]: Mul(O(x**6), exp(y), evaluate=False)
Out[4]:
⎛ 6⎞ y
O⎝x ⎠⋅ℯ
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