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MathGroup Archive 2006

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Re: Delayed Differential Equations [NDelayDSolve]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65204] Re: Delayed Differential Equations [NDelayDSolve]
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 17 Mar 2006 05:45:44 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <dvdibe$a1c$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

it is no wonder that NDelaySolve[] is so slow because it uses
NDSolve[]. The usual way to solve a delay equation is to use
a continuous output initial value solver, that allow the same
order for the interpolation for the method itself
and the continuous output.

Regards
  Jens


"ben" <benjamin.friedrich at gmail.com> schrieb im 
Newsbeitrag news:dvdibe$a1c$1 at smc.vnet.net...
| Hello,
|
| I need to integrate a delayed differential 
equation and experienced the
| following problems with NDelayDSolve:
|
| slow integration (10-100 times slower than 
NDSolve)
| warnings about precission, accuracy, ...
| warnings about zero residual
|
| Does anybody has experience with NDelayDSolve
| and knows how to circumvent this problems?
|
| Is NDelaySolve better?
|
| Thanks
| Ben
| 



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