Opened 18 months ago
Last modified 3 months ago
#13712 needs_work defect
wrong evaluation of infinite sum
Reported by: | burcin | Owned by: | burcin |
---|---|---|---|
Priority: | major | Milestone: | sage-6.2 |
Component: | symbolics | Keywords: | maxima |
Cc: | Merged in: | ||
Authors: | Reviewers: | Jeroen Demeyer | |
Report Upstream: | Fixed upstream, in a later stable release. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
From this ask.sagemath.org question:
sage: n = var('n') sage: sum(1/((2*n-1)^2*(2*n+1)^2*(2*n+3)^2), n, 0, oo) 3/256*pi^2 - 1/32
The correct answer is 3/256*pi^2.
We should report this to maxima:
(%i10) load(simplify_sum); (%o10) /tmpbig/burcin/sage-5.4/local/share/maxima/5.26.0/share/contrib/solve_r\ ec/simplify_sum.mac (%i11) simplify_sum(sum(1/((2*n-1)^2*(2*n+1)^2*(2*n+3)^2), n, 0, inf)); 2 %pi 2 ---- - 4 %pi 2 (%o11) ---- + -------- 128 128
Change History (7)
comment:1 Changed 18 months ago by kcrisman
- Report Upstream changed from N/A to Reported upstream. No feedback yet.
comment:2 Changed 11 months ago by jdemeyer
- Reviewers set to Jeroen Demeyer
- Status changed from new to needs_review
Fixed in Maxima 5.30.0: #13973.
comment:3 Changed 11 months ago by jdemeyer
- Report Upstream changed from Reported upstream. No feedback yet. to Fixed upstream, in a later stable release.
- Status changed from needs_review to positive_review
comment:4 Changed 11 months ago by jdemeyer
- Milestone changed from sage-5.10 to sage-5.11
comment:5 Changed 11 months ago by jdemeyer
- Status changed from positive_review to needs_work
Should add doctest.
comment:6 Changed 8 months ago by jdemeyer
- Milestone changed from sage-5.11 to sage-5.12
comment:7 Changed 3 months ago by vbraun_spam
- Milestone changed from sage-6.1 to sage-6.2
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I can confirm this is true in Maxima 5.28.0 as well. This is now Maxima artifact 3587514.