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From: SourceForge.net <noreply@so...>  20111114 22:22:25

Bugs item #3437268, was opened at 20111113 02:45 Message generated for change (Comment added) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437268&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: Fixed Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: expand doesn't fully expand Initial Comment: (%i1) (atan((sqrt(2)*sin(8))/cos(8))+3*%pi)/sqrt(2)+atan((sqrt(2)*sin(8))/cos(8))/sqrt(2)+sqrt(2)*%pi+%pi/sqrt(2); (%o1) atan((sqrt(2)*sin(8))/cos(8))/sqrt(2)+(atan((sqrt(2)*sin(8))/cos(8))3*%pi)/sqrt(2)+sqrt(2)*%pi+%pi/sqrt(2) (%i2) expand(%); (%o2) sqrt(2)*%pisqrt(2)*%pi (%i3) expand(%); (%o3) 0 (%i5) build_info(); Maxima version: 5.25.0 Maxima build date: 16:14 8/15/2011 Host type: i686pcmingw32 Lisp implementation type: GNU Common Lisp (GCL) Lisp implementation version: GCL 2.6.8 (%o5)  >Comment By: Dieter Kaiser (crategus) Date: 20111114 14:22 Message: Fixed in simp.lisp revision 14.11.2011. Closing this bug report as fixed. Dieter Kaiser  Comment By: Dieter Kaiser (crategus) Date: 20111113 06:49 Message: Some further remarks. The problem does not occur for numbers: (%i1) 3/sqrt(2)+sqrt(2)+1/sqrt(2); (%o1) 0 We have to multiply an additional constant into the sum: (%i4) 3*a/sqrt(2)+a*sqrt(2)+a/sqrt(2); (%o4) sqrt(2)*asqrt(2)*a Changing slightly the order gives the expected result: (%i5) a/sqrt(2)3*a/sqrt(2)+a*sqrt(2); (%o5) 0 The problem is, that the algorithm of plusin correctly simplifies: (%i7) 3*a/sqrt(2)+a/sqrt(2); (%o7) sqrt(2)*a But the algorithm does not look at the previous terms, which have already been put on the list of results and therefore the algorithm does not see that their is already a term sqrt(2)*a. The main problem here is, that the algorithm for a sum and a product are implemented as nary algorithm. A much more simple binary algorithm would not have these problems. But of course it would be much slower for a lot of other problems. I will think about a solution oft this problem. By the way: This is an old problem. In older versions of Maxima, e.g. Maxima 5.10 we get: (%i1) 3/sqrt(2)+sqrt(2)+1/sqrt(2); (%o1) sqrt(2)2/sqrt(2) (%i2) 3*a/sqrt(2)+a*sqrt(2)+a/sqrt(2); (%o2) sqrt(2)*a2*a/sqrt(2) (%i3) a/sqrt(2)3*a/sqrt(2)+a*sqrt(2); (%o3) sqrt(2)*a2*a/sqrt(2) This older version does not simplify 2/sqrt(2) to sqrt(2). Therefore, the problem might be not so obvious. Dieter Kaiser  Comment By: Dieter Kaiser (crategus) Date: 20111113 04:42 Message: This is a shorter example of the above problem: (%i3) sqrt(2)*%pi3*%pi/sqrt(2)+%pi/sqrt(2); (%o3) sqrt(2)*%pisqrt(2)*%pi Dieter Kaiser  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437268&group_id=4933 
From: SourceForge.net <noreply@so...>  20111114 21:10:15

Bugs item #3437923, was opened at 20111114 13:08 Message generated for change (Settings changed) made by catonga You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437923&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: Xmaxima or other UI Group: None Status: Open Resolution: None >Priority: 9 Private: No Submitted By: Oliver C. (catonga) Assigned to: Nobody/Anonymous (nobody) Summary: Possible Trojan horse or false positive Initial Comment: AVG Antivirus is reporting that xmaxima.exe is infected with a trojan horse. SHeur4.HKI This could be a false positive but it might be also possible, that it is not a false positive. See here the virus scan test result on jotti.org for more information to xmaxima.exe xmaxima.exe from maxima 5.25.1 http://virusscan.jotti.org/de/scanresult/0f225d450d7c370fa3ca25db091594aeb2b358be and xmaxima.exe from maxima 5.25.0 http://virusscan.jotti.org/de/scanresult/9d02f4b2779aef96ed327a0a8ba8b20b2ad5a96d I tried xmaxima.exe from the maxima5.25.0.exe and maxima5.25.1.exe installation packages for Windows. I also want to mention, that clicking on FAQ on http://maxima.sourceforge.net/ leads to a russian page not related to maxima showing the message that http://maximaproject.org/ domain registration is suspended.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437923&group_id=4933 
From: SourceForge.net <noreply@so...>  20111114 21:08:49

Bugs item #3437923, was opened at 20111114 13:08 Message generated for change (Tracker Item Submitted) made by catonga You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437923&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: Xmaxima or other UI Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Oliver C. (catonga) Assigned to: Nobody/Anonymous (nobody) Summary: Possible Trojan horse or false positive Initial Comment: AVG Antivirus is reporting that xmaxima.exe is infected with a trojan horse. SHeur4.HKI This could be a false positive but it might be also possible, that it is not a false positive. See here the virus scan test result on jotti.org for more information to xmaxima.exe xmaxima.exe from maxima 5.25.1 http://virusscan.jotti.org/de/scanresult/0f225d450d7c370fa3ca25db091594aeb2b358be and xmaxima.exe from maxima 5.25.0 http://virusscan.jotti.org/de/scanresult/9d02f4b2779aef96ed327a0a8ba8b20b2ad5a96d I tried xmaxima.exe from the maxima5.25.0.exe and maxima5.25.1.exe installation packages for Windows. I also want to mention, that clicking on FAQ on http://maxima.sourceforge.net/ leads to a russian page not related to maxima showing the message that http://maximaproject.org/ domain registration is suspended.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437923&group_id=4933 
From: SourceForge.net <noreply@so...>  20111114 16:12:08

Bugs item #3437841, was opened at 20111114 08:12 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437841&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: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: Definite integral doesn't use indefinite integral Initial Comment: Maxima 5.25.0 http://maxima.sourceforge.net using Lisp SBCL 1.0.24 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) integrate(1/(sqrt(x)*((1+sqrt(x))^2)),x,1,1); (%o1) 0 (%i2) integrate(1/(sqrt(x)*((1+sqrt(x))^2)),x,1,9); 9 / [ 1 (%o2) I  dx ] 2 / (sqrt(x) + 1) sqrt(x) 1 (%i3) integrate(1/(sqrt(x)*((1+sqrt(x))^2)),x); 2 (%o3)   sqrt(x) + 1  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3437841&group_id=4933 