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From: SourceForge.net <noreply@so...>  20090808 13:58:19

Bugs item #2834169, was opened at 20090808 15:58 Message generated for change (Tracker Item Submitted) made by jyoberle You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2834169&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  Solving equations Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: JeanYves (jyoberle) Assigned to: Nobody/Anonymous (nobody) Summary: Wrong solution with sqrt/asin equation solving Initial Comment: I noticed that when using latest version of Maxima: solve(1(asin(x^21))^2,x) gives [x=sqrt(1sin(1)),x=sqrt(1sin(1)),x=sqrt(sin(1)+1),x=sqrt(sin(1)+1)] which is correct. But: solve(sqrt(1(asin(x^21))^2),x) gives [] whereas I would have expected same solutions as above. Below are details about the Maxima version:  Maxima version: 5.18.1 Maxima build date: 20:57 4/19/2009 host type: i686pcmingw32 lispimplementationtype: GNU Common Lisp (GCL) lispimplementationversion: GCL 2.6.8  Best regards, JeanYves  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2834169&group_id=4933 
From: SourceForge.net <noreply@so...>  20100710 15:29:10

Bugs item #2834169, was opened at 20090808 15:58 Message generated for change (Settings changed) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2834169&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  Solving equations Group: None >Status: Closed >Resolution: Fixed Priority: 5 Private: No Submitted By: JeanYves (jyoberle) Assigned to: Nobody/Anonymous (nobody) Summary: Wrong solution with sqrt/asin equation solving Initial Comment: I noticed that when using latest version of Maxima: solve(1(asin(x^21))^2,x) gives [x=sqrt(1sin(1)),x=sqrt(1sin(1)),x=sqrt(sin(1)+1),x=sqrt(sin(1)+1)] which is correct. But: solve(sqrt(1(asin(x^21))^2),x) gives [] whereas I would have expected same solutions as above. Below are details about the Maxima version:  Maxima version: 5.18.1 Maxima build date: 20:57 4/19/2009 host type: i686pcmingw32 lispimplementationtype: GNU Common Lisp (GCL) lispimplementationversion: GCL 2.6.8  Best regards, JeanYves  >Comment By: Dieter Kaiser (crategus) Date: 20100710 17:29 Message: This problem is no longer present. We get for both examples: (%i2) solve((1(asin(x^21))^2),x); (%o2) [x = sqrt(1sin(1)),x = sqrt(1sin(1)),x = sqrt(sin(1)+1), x = sqrt(sin(1)+1)] (%i3) solve(sqrt(1(asin(x^21))^2),x); (%o3) [x = sqrt(1sin(1)),x = sqrt(1sin(1)),x = sqrt(sin(1)+1), x = sqrt(sin(1)+1)] I think this is because of revision 1.26 of solve.lisp. The algorithm has been improved to compare simplified expressions. Closing this bug report as fixed. Dieter Kaiser  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2834169&group_id=4933 