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From: SourceForge.net <noreply@so...>  20061024 03:43:08

Bugs item #1583312, was opened at 20061023 21:43 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&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: Lisp Core  Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Robert Dodier (robert_dodier) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(3^log(x), x); => incorrect, but risch => OK Initial Comment: integrate(3^log(x), x); => 3^((1/log(3)+1)*log(x))/((1/log(3)+1)*log(3)) and then ratsimp(diff(%, x)); => 3^(log(x)/log(3)+log(x))/x but integrate(3^log(x), x), risch; => x*%e^(log(3)*log(x))/(log(3)+1) and then ratsimp(diff(%, x)); => %e^(log(3)*log(x)) See discussion on the mailing list 2002/04/05 & following.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&group_id=4933 
From: SourceForge.net <noreply@so...>  20061026 17:43:57

Bugs item #1583312, was opened at 20061024 05:43 Message generated for change (Comment added) made by andrejv You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&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: Lisp Core  Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Robert Dodier (robert_dodier) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(3^log(x), x); => incorrect, but risch => OK Initial Comment: integrate(3^log(x), x); => 3^((1/log(3)+1)*log(x))/((1/log(3)+1)*log(3)) and then ratsimp(diff(%, x)); => 3^(log(x)/log(3)+log(x))/x but integrate(3^log(x), x), risch; => x*%e^(log(3)*log(x))/(log(3)+1) and then ratsimp(diff(%, x)); => %e^(log(3)*log(x)) See discussion on the mailing list 2002/04/05 & following.  >Comment By: Andrej Vodopivec (andrejv) Date: 20061026 19:43 Message: Logged In: YES user_id=1179910 I don't know what the discuission was, but I don't think there is a bug here: (%i1) integrate(3^log(x), x); (%o1) 3^((1/log(3)+1)*log(x))/((1/log(3)+1)*log(3)) (%i2) diff(%, x); (%o2) 3^((1/log(3)+1)*log(x))/x (%i3) radcan(%); (%o3) 3^log(x) Andrej  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&group_id=4933 
From: SourceForge.net <noreply@so...>  20061030 15:05:13

Bugs item #1583312, was opened at 20061023 21:43 Message generated for change (Comment added) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&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: Lisp Core  Integration Group: None >Status: Closed >Resolution: Rejected Priority: 5 Private: No Submitted By: Robert Dodier (robert_dodier) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(3^log(x), x); => incorrect, but risch => OK Initial Comment: integrate(3^log(x), x); => 3^((1/log(3)+1)*log(x))/((1/log(3)+1)*log(3)) and then ratsimp(diff(%, x)); => 3^(log(x)/log(3)+log(x))/x but integrate(3^log(x), x), risch; => x*%e^(log(3)*log(x))/(log(3)+1) and then ratsimp(diff(%, x)); => %e^(log(3)*log(x)) See discussion on the mailing list 2002/04/05 & following.  >Comment By: Robert Dodier (robert_dodier) Date: 20061030 08:05 Message: Logged In: YES user_id=501686 Andrej, you are correct, it is not a bug. Sorry for the unnecessary report. Closing this report.  Comment By: Andrej Vodopivec (andrejv) Date: 20061026 11:43 Message: Logged In: YES user_id=1179910 I don't know what the discuission was, but I don't think there is a bug here: (%i1) integrate(3^log(x), x); (%o1) 3^((1/log(3)+1)*log(x))/((1/log(3)+1)*log(3)) (%i2) diff(%, x); (%o2) 3^((1/log(3)+1)*log(x))/x (%i3) radcan(%); (%o3) 3^log(x) Andrej  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1583312&group_id=4933 
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