Updates:
Status: Valid
Labels: Series
Comment #2 on issue 4069 by [email protected]:
series(log(x)**a*exp(-b*x), x, x0=1, n=2) wrong result
http://code.google.com/p/sympy/issues/detail?id=4069
The result is not exactly wrong, but useless.
N.b., there is nothing wrong with O symbol in this context (see
documentation). O(x - 1) is about of the limiting behavior of f(x)=(x -
1) at the x=0!
More conventional O symbol was implemented here:
https://github.com/sympy/sympy/pull/2427
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