problem with NDSolve in version 7 vs. version 6
- To: mathgroup at smc.vnet.net
- Subject: [mg95652] problem with NDSolve in version 7 vs. version 6
- From: "Robert M. Lurie" <RMLURIE at ALUM.MIT.EDU>
- Date: Sat, 24 Jan 2009 06:17:11 -0500 (EST)
- References: <4978BF09.6010803@ALUM.MIT.EDU> <49797F7F.1030305@gmail.com>
- Reply-to: RMLURIE at ALUM.MIT.EDU
I have a particular problem that may have further ramifications. I have a demonstration on line at Wolfram http://demonstrations.wolfram.com/RestrictedThreeBodyProblem/ In version 6 the plot from NDSolve will "behave" properly up to time = 53, but in version 7 it fails at much earlier times. The same result (version 7 not giving a good calculation at later times compared to version 6) shows up at other "Jacobian constants". (The same result is shown in Player 6 vs Player 7). I have posted the attachment on http://home.comcast.net/~rmlurie/ as a pdf file called Comparison of ver 6 and ver 7. Many thanks, Robert M Lurie rmlurie at alum.mit.edu