NDSolve precision and velocity problem
- To: mathgroup at smc.vnet.net
- Subject: [mg91295] NDSolve precision and velocity problem
- From: Joerg Schaber <schaber at molgen.mpg.de>
- Date: Thu, 14 Aug 2008 06:58:15 -0400 (EDT)
I have an ODE system that takes lots of time to solve with NDSolve
whereas the same system with the FORTRAN solver LSODA
solves the problem in an second.
When I decrease the precision, e.g. AccuracyGoal->6, NDSolve crashes. It
often crashes, because it finds complex values in a less-than-comparison.
Maybe it's a method problem.
How do I tell NDSolve, to use the same methods as the LSODEA solver?
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