Re: NDSolve and differential equation system
- To: mathgroup at smc.vnet.net
- Subject: [mg54057] Re: NDSolve and differential equation system
- From: Christian Moosmann <some@Adress>
- Date: Wed, 9 Feb 2005 09:27:31 -0500 (EST)
- Organization: Rechenzentrum der Universitaet Freiburg, Germany
- References: <cu1vjh$ltj$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi again Thanks for your suggestions, using Erf[] instead of UnitStep[] gains a factor of about 2, so this is a step to the right direction. > You can a) use the wonderful advanced interface of NDSolve[] > to use a constant step size Sadly the IDA method does not support fixed step sizes. And - correct me if I am wrong - only the IDA method can solve differential algebraic equations. > However, if Ainv.K1 and Ainv.K2 commute Thanks for your effort here, but sadly they don't :-( Thanks again very much for your suggestions. Do you have some more? ;-) Christian