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## [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf);

 [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf); From: SourceForge.net - 2006-05-17 02:30:08 ```Bugs item #1471813, was opened at 2006-04-17 10:07 Message generated for change (Settings changed) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&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: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(1/(x^2 + 4)^(3/2),x,0,inf); Initial Comment: (%i1) integrate(1/(x^2 + 4)^(3/2),x,0,inf); Maxima encountered a Lisp error: Error in PROGN [or a callee]: Error in do-arg-count-error: DESTRUCTURING-BIND NIL NIL (L ... Let's try the integral from minf to inf: (%i2) integrate(1/(x^2 + 4)^(3/2),x,minf,inf); Is x positive or negative? pos; (%o2) 1/2 The question is silly, but 1/2 is the correct value for the integral. (%i3) build_info(); Maxima version: 5.9.2.19cvs Maxima build date: 9:42 4/10/2006 host type: i686-pc-mingw32 lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.7 (%o3) Barton ---------------------------------------------------------------------- Comment By: Raymond Toy (rtoy) Date: 2006-05-06 07:57 Message: Logged In: YES user_id=28849 FWIW, the question comes when maxima is computing limit(x*(4+x^2)^(-3/2),x,minf). I think this is really a bug in limit---it ought to know that x is negative in this case. ---------------------------------------------------------------------- Comment By: Raymond Toy (rtoy) Date: 2006-04-17 10:14 Message: Logged In: YES user_id=28849 Try with the CVS version. It returns 1/4 for the first integral, but still asks about x for the second integral. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&group_id=4933 ```

 [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf); From: SourceForge.net - 2006-04-17 16:07:22 ```Bugs item #1471813, was opened at 2006-04-17 11:07 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=1471813&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 Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(1/(x^2 + 4)^(3/2),x,0,inf); Initial Comment: (%i1) integrate(1/(x^2 + 4)^(3/2),x,0,inf); Maxima encountered a Lisp error: Error in PROGN [or a callee]: Error in do-arg-count-error: DESTRUCTURING-BIND NIL NIL (L ... Let's try the integral from minf to inf: (%i2) integrate(1/(x^2 + 4)^(3/2),x,minf,inf); Is x positive or negative? pos; (%o2) 1/2 The question is silly, but 1/2 is the correct value for the integral. (%i3) build_info(); Maxima version: 5.9.2.19cvs Maxima build date: 9:42 4/10/2006 host type: i686-pc-mingw32 lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.7 (%o3) Barton ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf); From: SourceForge.net - 2006-04-17 16:14:19 ```Bugs item #1471813, was opened at 2006-04-17 12:07 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&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 Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(1/(x^2 + 4)^(3/2),x,0,inf); Initial Comment: (%i1) integrate(1/(x^2 + 4)^(3/2),x,0,inf); Maxima encountered a Lisp error: Error in PROGN [or a callee]: Error in do-arg-count-error: DESTRUCTURING-BIND NIL NIL (L ... Let's try the integral from minf to inf: (%i2) integrate(1/(x^2 + 4)^(3/2),x,minf,inf); Is x positive or negative? pos; (%o2) 1/2 The question is silly, but 1/2 is the correct value for the integral. (%i3) build_info(); Maxima version: 5.9.2.19cvs Maxima build date: 9:42 4/10/2006 host type: i686-pc-mingw32 lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.7 (%o3) Barton ---------------------------------------------------------------------- >Comment By: Raymond Toy (rtoy) Date: 2006-04-17 12:14 Message: Logged In: YES user_id=28849 Try with the CVS version. It returns 1/4 for the first integral, but still asks about x for the second integral. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf); From: SourceForge.net - 2006-05-06 13:57:34 ```Bugs item #1471813, was opened at 2006-04-17 12:07 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&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 Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(1/(x^2 + 4)^(3/2),x,0,inf); Initial Comment: (%i1) integrate(1/(x^2 + 4)^(3/2),x,0,inf); Maxima encountered a Lisp error: Error in PROGN [or a callee]: Error in do-arg-count-error: DESTRUCTURING-BIND NIL NIL (L ... Let's try the integral from minf to inf: (%i2) integrate(1/(x^2 + 4)^(3/2),x,minf,inf); Is x positive or negative? pos; (%o2) 1/2 The question is silly, but 1/2 is the correct value for the integral. (%i3) build_info(); Maxima version: 5.9.2.19cvs Maxima build date: 9:42 4/10/2006 host type: i686-pc-mingw32 lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.7 (%o3) Barton ---------------------------------------------------------------------- >Comment By: Raymond Toy (rtoy) Date: 2006-05-06 09:57 Message: Logged In: YES user_id=28849 FWIW, the question comes when maxima is computing limit(x*(4+x^2)^(-3/2),x,minf). I think this is really a bug in limit---it ought to know that x is negative in this case. ---------------------------------------------------------------------- Comment By: Raymond Toy (rtoy) Date: 2006-04-17 12:14 Message: Logged In: YES user_id=28849 Try with the CVS version. It returns 1/4 for the first integral, but still asks about x for the second integral. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-1471813 ] integrate(1/(x^2 + 4)^(3/2),x,0,inf); From: SourceForge.net - 2006-05-17 02:30:08 ```Bugs item #1471813, was opened at 2006-04-17 10:07 Message generated for change (Settings changed) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&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: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(1/(x^2 + 4)^(3/2),x,0,inf); Initial Comment: (%i1) integrate(1/(x^2 + 4)^(3/2),x,0,inf); Maxima encountered a Lisp error: Error in PROGN [or a callee]: Error in do-arg-count-error: DESTRUCTURING-BIND NIL NIL (L ... Let's try the integral from minf to inf: (%i2) integrate(1/(x^2 + 4)^(3/2),x,minf,inf); Is x positive or negative? pos; (%o2) 1/2 The question is silly, but 1/2 is the correct value for the integral. (%i3) build_info(); Maxima version: 5.9.2.19cvs Maxima build date: 9:42 4/10/2006 host type: i686-pc-mingw32 lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.7 (%o3) Barton ---------------------------------------------------------------------- Comment By: Raymond Toy (rtoy) Date: 2006-05-06 07:57 Message: Logged In: YES user_id=28849 FWIW, the question comes when maxima is computing limit(x*(4+x^2)^(-3/2),x,minf). I think this is really a bug in limit---it ought to know that x is negative in this case. ---------------------------------------------------------------------- Comment By: Raymond Toy (rtoy) Date: 2006-04-17 10:14 Message: Logged In: YES user_id=28849 Try with the CVS version. It returns 1/4 for the first integral, but still asks about x for the second integral. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1471813&group_id=4933 ```