Updates:
Cc: [email protected]
Comment #11 on issue 1066 by asmeurer: sum(1/(x+2)**3,(x,1,oo)) doesn't do
it
http://code.google.com/p/sympy/issues/detail?id=1066
This now gives
In [1]: summation(1/(x+2)**3,(x,1,oo))
Out[1]:
┌─ ⎛3, 3, 3, 1 │ ⎞
├─ ⎜ │ 1⎟
4╵ 3 ⎝ 4, 4, 4 │ ⎠
─────────────────────
27
In [2]: summation(1/(x+2)**3,(x,1,oo)).expand(func=True)
Out[2]:
┌─ ⎛3, 3, 3, 1 │ ⎞
├─ ⎜ │ 1⎟
4╵ 3 ⎝ 4, 4, 4 │ ⎠
─────────────────────
27
In [3]: summation(1/(x+2)**3,(x,1,oo)).evalf()
Out[3]: 0.0770569031595943
In [4]: Sum(1/(x+2)**3,(x,1,oo)).evalf()
Out[4]: 0.0770569031595943
So it *works*, but the answer with zeta() would be nice. Tom, can this be
fixed? Also, this should be tested in any case.
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