From: SourceForge.net <noreply@so...>  20030625 19:37:51

Bugs item #760722, was opened at 20030625 12:37 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=760722&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: errors in integrate and factor Initial Comment: 2 6 4 4 6 2 8 432 a y  504 a y + 6 a y  3 a  2 2 11/2 2 (y + a ) (C26) integrate(%,y,minf,inf); Typeerror in KERNEL::OBJECTNOTFIXNUMERRORHANDLER: NIL is not of type FIXNUM The same error occured in FACTOR on sqrt(y^2+a^2)*(432*a^2*y^6504*a^4*y^4+6*a^6*y^23*a^8)/(2*y^12+12*a^2*y^10+30*a^4*y^8+30*a^8*y^2 +12*a^10*y^2+2*a^12) These errors occured in the following version: Maxima version: 5.9.0 Maxima build date: 21:17 2/9/2003 host type: i386redhatlinuxgnu lispimplementationtype: CMU Common Lisp lispimplementationversion: 18d  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&group_id=4933 
From: SourceForge.net <noreply@so...>  20030707 04:05:39

Bugs item #760722, was opened at 20030625 15:37 Message generated for change (Comment added) made by macrakis You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: errors in integrate and factor Initial Comment: 2 6 4 4 6 2 8 432 a y  504 a y + 6 a y  3 a  2 2 11/2 2 (y + a ) (C26) integrate(%,y,minf,inf); Typeerror in KERNEL::OBJECTNOTFIXNUMERRORHANDLER: NIL is not of type FIXNUM The same error occured in FACTOR on sqrt(y^2+a^2)*(432*a^2*y^6504*a^4*y^4+6*a^6*y^23*a^8)/(2*y^12+12*a^2*y^10+30*a^4*y^8+30*a^8*y^2 +12*a^10*y^2+2*a^12) These errors occured in the following version: Maxima version: 5.9.0 Maxima build date: 21:17 2/9/2003 host type: i386redhatlinuxgnu lispimplementationtype: CMU Common Lisp lispimplementationversion: 18d  >Comment By: Stavros Macrakis (macrakis) Date: 20030707 00:05 Message: Logged In: YES user_id=588346 Please use the linear form of expressions  this bug reporting system loses formatting. I believe the original expression was (432*a^2*y^2504*a^4*y^4+6*a^6*y^23*a^9) / (2 * (y^2 + a^2) ^(11/2) ) Is that right? In 5.9.0/gcl/Windows, I don't get the error you report. ON the other hand, Maxima stupidly asks whether y is pos or neg (but y only appears as y^2). It does give a result in terms of a after a few questions. I have no idea whether this result is correct.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&group_id=4933 
From: SourceForge.net <noreply@so...>  20060410 04:09:10

Bugs item #760722, was opened at 20030625 13:37 Message generated for change (Settings changed) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&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 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: errors in integrate and factor Initial Comment: 2 6 4 4 6 2 8 432 a y  504 a y + 6 a y  3 a  2 2 11/2 2 (y + a ) (C26) integrate(%,y,minf,inf); Typeerror in KERNEL::OBJECTNOTFIXNUMERRORHANDLER: NIL is not of type FIXNUM The same error occured in FACTOR on sqrt(y^2+a^2)*(432*a^2*y^6504*a^4*y^4+6*a^6*y^23*a^8)/(2*y^12+12*a^2*y^10+30*a^4*y^8+30*a^8*y^2 +12*a^10*y^2+2*a^12) These errors occured in the following version: Maxima version: 5.9.0 Maxima build date: 21:17 2/9/2003 host type: i386redhatlinuxgnu lispimplementationtype: CMU Common Lisp lispimplementationversion: 18d  Comment By: Stavros Macrakis (macrakis) Date: 20030706 22:05 Message: Logged In: YES user_id=588346 Please use the linear form of expressions  this bug reporting system loses formatting. I believe the original expression was (432*a^2*y^2504*a^4*y^4+6*a^6*y^23*a^9) / (2 * (y^2 + a^2) ^(11/2) ) Is that right? In 5.9.0/gcl/Windows, I don't get the error you report. ON the other hand, Maxima stupidly asks whether y is pos or neg (but y only appears as y^2). It does give a result in terms of a after a few questions. I have no idea whether this result is correct.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&group_id=4933 
From: SourceForge.net <noreply@so...>  20060410 04:59:02

Bugs item #760722, was opened at 20030625 13:37 Message generated for change (Comment added) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&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: Works For Me Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: errors in integrate and factor Initial Comment: 2 6 4 4 6 2 8 432 a y  504 a y + 6 a y  3 a  2 2 11/2 2 (y + a ) (C26) integrate(%,y,minf,inf); Typeerror in KERNEL::OBJECTNOTFIXNUMERRORHANDLER: NIL is not of type FIXNUM The same error occured in FACTOR on sqrt(y^2+a^2)*(432*a^2*y^6504*a^4*y^4+6*a^6*y^23*a^8)/(2*y^12+12*a^2*y^10+30*a^4*y^8+30*a^8*y^2 +12*a^10*y^2+2*a^12) These errors occured in the following version: Maxima version: 5.9.0 Maxima build date: 21:17 2/9/2003 host type: i386redhatlinuxgnu lispimplementationtype: CMU Common Lisp lispimplementationversion: 18d  >Comment By: Robert Dodier (robert_dodier) Date: 20060409 22:58 Message: Logged In: YES user_id=501686 I don't see the " NIL is not of type FIXNUM" errors cited by the original poster. (1) (432 * a^2 * y^6  504 * a^4 * y^4 + 6 * a^6 * y^2  3 * a^8) / (2*(y^2 + a^2)^(11/2)); integrate(%,y,minf,inf); => 0 after spurious asksign for y and (meaningful) asksign for a. From what I can tell, 0 is correct: realroots applied the numerator of the above expr yields [y = 36136957/33554432,y = 36136957/33554432], and integrating from 0 to 36136957/33554432 and from 36136957/33554432 to inf shows the pieces are equal and opposite. Also quad_qagi (quadpack function for infinite interval) seems to show integral is 0 to within tolerance. (By the way, I got the above expression by inspecting the HTML page source  the ascii art layout is comprehensible that way.) (2) sqrt(y^2+a^2) * (432*a^2*y^6504*a^4*y^4+6*a^6*y^23*a^8) / (2*y^12+12*a^2*y^10+30*a^4*y^8+30*a^8*y^2 + 12*a^10*y^2+2*a^12); factor(%); => pretty much the same expression (no error) Works the same with 5.9.1 / CMUCL 19a and 5.9.3 / Clisp 2.34 (both Linux). Closing this report as "works for me" (but I'll open another about the spurious asksign for y).  Comment By: Stavros Macrakis (macrakis) Date: 20030706 22:05 Message: Logged In: YES user_id=588346 Please use the linear form of expressions  this bug reporting system loses formatting. I believe the original expression was (432*a^2*y^2504*a^4*y^4+6*a^6*y^23*a^9) / (2 * (y^2 + a^2) ^(11/2) ) Is that right? In 5.9.0/gcl/Windows, I don't get the error you report. ON the other hand, Maxima stupidly asks whether y is pos or neg (but y only appears as y^2). It does give a result in terms of a after a few questions. I have no idea whether this result is correct.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=760722&group_id=4933 