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Groups > comp.soft-sys.math.mathematica > #3380 > unrolled thread
| Started by | Dario <dario.benedetti@aei.mpg.de> |
|---|---|
| First post | 2011-06-29 21:42 +0000 |
| Last post | 2011-06-29 21:42 +0000 |
| Articles | 1 — 1 participant |
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Bug in Sum? Dario <dario.benedetti@aei.mpg.de> - 2011-06-29 21:42 +0000
| From | Dario <dario.benedetti@aei.mpg.de> |
|---|---|
| Date | 2011-06-29 21:42 +0000 |
| Subject | Bug in Sum? |
| Message-ID | <iug693$9j0$1@smc.vnet.net> |
I am very puzzled by the fact that Mathematica does not evaluate the following Sum (it keeps running endlessly):
Sum[1/(n (1 + n)) 1/((1 - x)^4) , {n, 1, M}]
where x and M are some undefined variables,
but it does evaluate
Sum[1/(n (1 + n)) 1/((1 - x)^2) , {n, 1, M}]
where I have only changed the power of (1-x), which should not matter as it must factor out!
Any help on this please?
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