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MathGroup Archive 2004

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Re: Nonlinear diff equation help

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51637] Re: Nonlinear diff equation help
  • From: Kevin <kmccann at umbc.edu>
  • Date: Wed, 27 Oct 2004 23:42:41 -0400 (EDT)
  • Organization: University of Maryland, Baltimore County
  • References: <clneui$od4$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

This is difficult to answer without numerical values for A,B,C,D

Dimitris wrote:
> Hi,
> 
> I have a nonlinear equation: 
> 
> -A + B y[x]^-1 + C y'[x] + D y''[x]=0
> 
> with boundary conditions:
> 
> y[inf]=B
> y'[inf]0;
> 
> Trying to solve with NDSolve from x=0 to x=100 and get (300=infinity):
> 
> NDSolve::ndnum: Encountered non-numerical value for a derivative at x
> == \
> 300.`.
> 
> Any ideas?
> 
> Thanks
> Dimitris
> 


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