Issue 413: series bug: 1/((a + 1/x)**3 - a**3)*(a + (a + 1/x)**2 - (1 +
a)*(a + 1/x))
http://code.google.com/p/sympy/issues/detail?id=413
Comment #10 by ondrej.certik:
All is fixed now:
In [6]: e=1/((a + 1/x)**3 - a**3)*(a + (a + 1/x)**2 - (1 + a)*(a + 1/x))
In [7]: e.expand().normal().series(x, 4)
Out[7]:
2 2 3 2 3 2 4 3 4 3 5 4 6
x - x - 2⋅a⋅x + 3⋅a⋅x + 3⋅a ⋅x - 6⋅a ⋅x - 3⋅a ⋅x + 9⋅a ⋅x - 9⋅a ⋅x
+ 9
5 6 6 7 7 8 6 8 8 9
⋅a ⋅x - 531468⋅a ⋅x - 11691648⋅a ⋅x + 531468⋅a ⋅x - 132328890⋅a ⋅x +
1116
7 9 9 10 8 10 10 11
0180⋅a ⋅x - 1016646552⋅a ⋅x + 121168710⋅a ⋅x - 5917595535⋅a ⋅x +
89547
9 11 11 12 10 12 12
13
7842⋅a ⋅x - 27659909970⋅a ⋅x + 5022117693⋅a ⋅x - 107564720553⋅a ⋅x
11 13 13 14 12 14
+ 22637792277⋅a ⋅x - 356248818603⋅a ⋅x + 84926928276⋅a ⋅x -
102126113
14 15 13 15
3016⋅a ⋅x + 271321890327⋅a ⋅x + O(x**16)
In [8]: e.series(x, 4)
Out[8]:
2 2 3 2 3
x - x - 2⋅a⋅x + 3⋅a⋅x + 3⋅a ⋅x + O(x**4)
These series occur in limits and all limits are now working in sympy. :)
Well, except
two, but the ones triggering this issue are working.
Issue attribute updates:
Status: Fixed
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