## [Maxima-bugs] [ maxima-Bugs-3216684 ] solution not in domain, and others missed

 [Maxima-bugs] [ maxima-Bugs-3216684 ] solution not in domain, and others missed From: SourceForge.net - 2011-03-16 16:09:10 ```Bugs item #3216684, was opened at 2011-03-16 16:09 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3216684&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: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: solution not in domain, and others missed Initial Comment: Maxima 5.23.2 http://maxima.sourceforge.net using Lisp ECL 11.1.1 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) solve([(2*x^2/(x^2 + y^2) + log(x^2 + y^2))*(x^2 + y^2)^x,2*x*y*(x^2 + y^2)^(x - 1)],[x,y]); (%o1) [[x = 0, y = 0]] This is not in the domain of the first expression. Further, there are four actual solutions which are not found. (%i8) f(x,y):=(2*x^2/(x^2 + y^2) + log(x^2 + y^2))*(x^2 + y^2)^x; 2 2 2 2 x 2 2 x (%o8) f(x, y) := (log(y + x ) + -------) (y + x ) 2 2 y + x (%i9) g(x,y):=2*x*y*(x^2 + y^2)^(x - 1); 2 2 x - 1 (%o9) g(x, y) := 2 x y (y + x ) (%i10) f(0,1); (%o10) 0 (%i11) g(0,1); (%o11) 0 (%i17) f(1/%e,0); (%o17) 0 (%i18) g(1/%e,0); (%o18) 0 ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3216684&group_id=4933 ```

 [Maxima-bugs] [ maxima-Bugs-3216684 ] solution not in domain, and others missed From: SourceForge.net - 2011-03-16 16:09:10 ```Bugs item #3216684, was opened at 2011-03-16 16:09 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3216684&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: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: solution not in domain, and others missed Initial Comment: Maxima 5.23.2 http://maxima.sourceforge.net using Lisp ECL 11.1.1 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) solve([(2*x^2/(x^2 + y^2) + log(x^2 + y^2))*(x^2 + y^2)^x,2*x*y*(x^2 + y^2)^(x - 1)],[x,y]); (%o1) [[x = 0, y = 0]] This is not in the domain of the first expression. Further, there are four actual solutions which are not found. (%i8) f(x,y):=(2*x^2/(x^2 + y^2) + log(x^2 + y^2))*(x^2 + y^2)^x; 2 2 2 2 x 2 2 x (%o8) f(x, y) := (log(y + x ) + -------) (y + x ) 2 2 y + x (%i9) g(x,y):=2*x*y*(x^2 + y^2)^(x - 1); 2 2 x - 1 (%o9) g(x, y) := 2 x y (y + x ) (%i10) f(0,1); (%o10) 0 (%i11) g(0,1); (%o11) 0 (%i17) f(1/%e,0); (%o17) 0 (%i18) g(1/%e,0); (%o18) 0 ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3216684&group_id=4933 ```