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MathGroup Archive 2000

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Re: system of nonlinear ODE

  • To: mathgroup at smc.vnet.net
  • Subject: [mg23827] Re: system of nonlinear ODE
  • From: Martin Stockhammer <martin.stockhammer at visualanalysis.com>
  • Date: Sat, 10 Jun 2000 03:00:48 -0400 (EDT)
  • Organization: Visual Analysis GmbH
  • References: <8gv85p$5mt@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Ioanna,

please send your complete NDSolve call or the notebook.
Did you use '=='  for all equations?

Bye
Martin Stockhammer

Ioanna Pappa wrote:
> 
> Hi
> I am trying to solve a system of two nonlinear ordinary differential
> equations with initial conditions.
> The system
> is
>                            f'''(x)+2.4f(x)f''(x)-0.8(f')**2+z=0
>                           z''(x)+2.4Pr[f(x)z(x)]'=0
>                  with z(0)=0, z'(0)=0, f''(0)=0, f(0)=0, f'(10)=0
> I use NDSolve end the message that gives me is:
> NDSolve::deql:
> The first argument must have both an equation and an initial condition.
> Can you help me;
> Gianna
> ipappa at mie.uth.gr

-- 
---

Martin Stockhammer
Visual Analysis GmbH
http://www.visualanalysis.com
email: martin.stockhammer at visualanalysis.com


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