[Maxima-bugs] [ maxima-Bugs-701364 ] desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG

 [Maxima-bugs] [ maxima-Bugs-701364 ] desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG From: SourceForge.net - 2003-04-08 02:33:07 ```Bugs item #701364, was opened at 2003-03-11 01:36 Message generated for change (Settings changed) made by macrakis You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 Category: None Group: None >Status: Closed >Resolution: Invalid Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG Initial Comment: (C4) desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 3 y - 5 3 y - 5 it should be 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 y - 5 y - 5 ---------------------------------------------------------------------- Comment By: Stavros Macrakis (macrakis) Date: 2003-03-11 07:57 Message: Logged In: YES user_id=588346 This is not a bug in desolve. As the documentation says, desolve requires functional dependencies to be explicit -- there is no connection between the function y(x) and the variable y. It turns out that desolve can't solve this equation, but ode2 claims to. I don't know if its solution is correct. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 ```

 [Maxima-bugs] [ maxima-Bugs-701364 ] desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG From: SourceForge.net - 2003-03-11 06:25:40 ```Bugs item #701364, was opened at 2003-03-10 22:36 You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG Initial Comment: (C4) desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 3 y - 5 3 y - 5 it should be 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 y - 5 y - 5 ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-701364 ] desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG From: SourceForge.net - 2003-03-11 12:46:36 ```Bugs item #701364, was opened at 2003-03-11 01:36 You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG Initial Comment: (C4) desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 3 y - 5 3 y - 5 it should be 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 y - 5 y - 5 ---------------------------------------------------------------------- Comment By: Stavros Macrakis (macrakis) Date: 2003-03-11 07:57 Message: Logged In: YES user_id=588346 This is not a bug in desolve. As the documentation says, desolve requires functional dependencies to be explicit -- there is no connection between the function y(x) and the variable y. It turns out that desolve can't solve this equation, but ode2 claims to. I don't know if its solution is correct. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-701364 ] desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG From: SourceForge.net - 2003-04-08 02:33:07 ```Bugs item #701364, was opened at 2003-03-11 01:36 Message generated for change (Settings changed) made by macrakis You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 Category: None Group: None >Status: Closed >Resolution: Invalid Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); WRONG Initial Comment: (C4) desolve(diff(y(x),x)=(4-2*x)/(3*y^2-5),y(x)); 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 3 y - 5 3 y - 5 it should be 2 x 4 x (D4) y(x) = - -------- + -------- + y(0) 2 2 y - 5 y - 5 ---------------------------------------------------------------------- Comment By: Stavros Macrakis (macrakis) Date: 2003-03-11 07:57 Message: Logged In: YES user_id=588346 This is not a bug in desolve. As the documentation says, desolve requires functional dependencies to be explicit -- there is no connection between the function y(x) and the variable y. It turns out that desolve can't solve this equation, but ode2 claims to. I don't know if its solution is correct. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=701364&group_id=4933 ```