#10273 closed defect (duplicate)
Maxima returns wrong value for sum(binomial(j,k),j,k,n)
Reported by: | jpflori | Owned by: | burcin |
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Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | symbolics | Keywords: | maxima |
Cc: | Merged in: | ||
Authors: | Reviewers: | ||
Report Upstream: | Fixed upstream, in a later stable release. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
The -1 should not be here:
sage: sum(binomial(j,k),j,k,k+1) k + 2 sage: sum(binomial(j,k),j,k,n) binomial(n + 1, k + 1) - 1 sage: sum(binomial(j,k),j,k,n).subs({n:k+1}) binomial(k + 2, k + 1) - 1 sage: maxima_console() ;;; Loading #P"/home/jp/boulot/sage/sage-4.6/local/lib/ecl/defsystem.fas" ;;; Loading #P"/home/jp/boulot/sage/sage-4.6/local/lib/ecl/cmp.fas" ;;; Loading #P"/home/jp/boulot/sage/sage-4.6/local/lib/ecl/sysfun.lsp" Maxima 5.20.1 http://maxima.sourceforge.net using Lisp ECL 10.2.1 Distributed under the GNU Public License. See the file COPYING. Dedicated to the memory of William Schelter. The function bug_report() provides bug reporting information. (%i1) load("simplify_sum"); (%o1) /home/jp/boulot/sage/sage-4.6/local/share/maxima/5.20.1/share/contrib/so\ lve_rec/simplify_sum.mac (%i2) sum(binomial(j,k),j,k,n); n ==== \ (%o2) > binomial(j, k) / ==== j = k (%i3) simplify_sum(%); (%o3) binomial(n + 1, k + 1) - 1 (%i4) sum(binomial(j,k),j,0,n); n ==== \ (%o4) > binomial(j, k) / ==== j = 0 (%i5) simplify_sum(%); (%o5) binomial(n + 1, k + 1) - binomial(1, k + 1)
Change History (3)
comment:1 Changed 12 years ago by
Report Upstream: | N/A → Fixed upstream, in a later stable release. |
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comment:2 Changed 12 years ago by
Keywords: | maxima added |
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Resolution: | → duplicate |
Status: | new → closed |
Sorry for the noise, it was already mentionned here: #7952
However the patch to maxima was not included yet.
comment:3 Changed 12 years ago by
Milestone: | → sage-duplicate/invalid/wontfix |
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I just tested it with Maxima 5.22.1 and Ecl from #10187 and the result is now correct. So updating to that version will fix this problem.