# Just Launched: You can now import projects and releases from Google Code onto SourceForge

We are excited to release new functionality to enable a 1-click import from Google Code onto the Allura platform on SourceForge. You can import tickets, wikis, source, releases, and more with a few simple steps.

## maxima-bugs

 [Maxima-bugs] [ maxima-Bugs-2942553 ] hgfred([-n, n+1], [1], x) not correct From: SourceForge.net - 2010-01-29 22:17:48 ```Bugs item #2942553, was opened at 2010-01-29 23:17 Message generated for change (Tracker Item Submitted) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Dieter Kaiser (crategus) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([-n,n+1],[1],x) not correct Initial Comment: The result of hgfred([-n,1+n],[1],x) is not correct. This is what Maxima gives: (%i1) res:hgfred([-n,n+1],[1],x); Is x positive, negative, or zero? p; Is x-1 positive, negative, or zero? n; (%o1) legendre_p(-n-1,1-2*x) The correct result is legendre_p(n, 1-2*x). For the special values n=1, n=2, n=3, ... Maxima gives the correct results: (%i2) hgfred([-1,1+1],[1],x); (%o2) 1-2*x (%i3) hgfred([-2,2+1],[1],x); (%o3) 6*x^2-6*x+1 (%i4) hgfred([-3,3+1],[1],x); (%o4) -20*x^3+30*x^2-12*x+1 We can not reproduce the correct results, when we insert the special values in the result from above: (%i5) res,n=1; (%o5) 0 (%i6) res,n=2; (%o6) 0 (%i7) res,n=3; (%o7) 0 Furthermore, I think the question for the sign of the argument x is not necessary. The problem is in the algorithm of the routine legf14. Dieter Kaiser ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-2942553 ] hgfred([-n, n+1], [1], x) not correct From: SourceForge.net - 2010-01-29 23:04:09 ```Bugs item #2942553, was opened at 2010-01-29 23:17 Message generated for change (Comment added) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None >Status: Pending >Resolution: Invalid Priority: 5 Private: No Submitted By: Dieter Kaiser (crategus) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([-n,n+1],[1],x) not correct Initial Comment: The result of hgfred([-n,1+n],[1],x) is not correct. This is what Maxima gives: (%i1) res:hgfred([-n,n+1],[1],x); Is x positive, negative, or zero? p; Is x-1 positive, negative, or zero? n; (%o1) legendre_p(-n-1,1-2*x) The correct result is legendre_p(n, 1-2*x). For the special values n=1, n=2, n=3, ... Maxima gives the correct results: (%i2) hgfred([-1,1+1],[1],x); (%o2) 1-2*x (%i3) hgfred([-2,2+1],[1],x); (%o3) 6*x^2-6*x+1 (%i4) hgfred([-3,3+1],[1],x); (%o4) -20*x^3+30*x^2-12*x+1 We can not reproduce the correct results, when we insert the special values in the result from above: (%i5) res,n=1; (%o5) 0 (%i6) res,n=2; (%o6) 0 (%i7) res,n=3; (%o7) 0 Furthermore, I think the question for the sign of the argument x is not necessary. The problem is in the algorithm of the routine legf14. Dieter Kaiser ---------------------------------------------------------------------- >Comment By: Dieter Kaiser (crategus) Date: 2010-01-30 00:04 Message: Sorry, I have overseen the identity legendre_p(-n-1,x) = legendre_p(n,x). With this identity the result of hgfred might be not nice, but it is correct. Unfortunately, legendre_p(-n-1,x) does not simplify to correct values. Perhaps this might be called a bug. Setting the status to pending and the resolution to invalid. Dieter Kaiser ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-2942553 ] hgfred([-n, n+1], [1], x) not correct From: SourceForge.net - 2010-02-13 02:20:20 ```Bugs item #2942553, was opened at 2010-01-29 22:17 Message generated for change (Comment added) made by sf-robot You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None >Status: Closed Resolution: Invalid Priority: 5 Private: No Submitted By: Dieter Kaiser (crategus) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([-n,n+1],[1],x) not correct Initial Comment: The result of hgfred([-n,1+n],[1],x) is not correct. This is what Maxima gives: (%i1) res:hgfred([-n,n+1],[1],x); Is x positive, negative, or zero? p; Is x-1 positive, negative, or zero? n; (%o1) legendre_p(-n-1,1-2*x) The correct result is legendre_p(n, 1-2*x). For the special values n=1, n=2, n=3, ... Maxima gives the correct results: (%i2) hgfred([-1,1+1],[1],x); (%o2) 1-2*x (%i3) hgfred([-2,2+1],[1],x); (%o3) 6*x^2-6*x+1 (%i4) hgfred([-3,3+1],[1],x); (%o4) -20*x^3+30*x^2-12*x+1 We can not reproduce the correct results, when we insert the special values in the result from above: (%i5) res,n=1; (%o5) 0 (%i6) res,n=2; (%o6) 0 (%i7) res,n=3; (%o7) 0 Furthermore, I think the question for the sign of the argument x is not necessary. The problem is in the algorithm of the routine legf14. Dieter Kaiser ---------------------------------------------------------------------- >Comment By: SourceForge Robot (sf-robot) Date: 2010-02-13 02:20 Message: This Tracker item was closed automatically by the system. It was previously set to a Pending status, and the original submitter did not respond within 14 days (the time period specified by the administrator of this Tracker). ---------------------------------------------------------------------- Comment By: Dieter Kaiser (crategus) Date: 2010-01-29 23:04 Message: Sorry, I have overseen the identity legendre_p(-n-1,x) = legendre_p(n,x). With this identity the result of hgfred might be not nice, but it is correct. Unfortunately, legendre_p(-n-1,x) does not simplify to correct values. Perhaps this might be called a bug. Setting the status to pending and the resolution to invalid. Dieter Kaiser ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2942553&group_id=4933 ```