#10564: bug in symbolic sums
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Reporter: zimmerma | Owner: burcin
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.6.2
Component: calculus | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by jpflori):
Replying to [comment:5 aapitzsch]:
> Tested on 4.6.2.alpha0. ` File
"/scratch/sage-4.6.1/devel/sage/sage/calculus/calculus.py", line 513:
sage: sum (n^3 * x^n, n, 0, infinity) Expected: -(x^3 + 4*x^2 + x)/(-x^4 +
4*x^3 - 6*x^2 + 4*x - 1) Got: (x^3 + 4*x^2 + x)/(x^4 - 4*x^3 + 6*x^2 - 4*x
+ 1) `^^ ^^
Oops, my patch is indeed wrong because I use a modified version of pynac.
I just checked with the standard spkg and got the same result as you.
So you got the correct expression and I'll attach a correct patch right
now.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10564#comment:6>
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