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MathGroup Archive 2007

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Re: Integrating Differential Equations with Time Delay

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75546] Re: Integrating Differential Equations with Time Delay
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Sat, 5 May 2007 05:53:19 -0400 (EDT)
  • References: <f1eqpt$59j$1@smc.vnet.net>

Hi,

there are Delay solvers on MathSource
http://library.wolfram.com/infocenter/MathSource/725/

but you can still use a continuous output Runge-Kutta method
and modify it as a delay solver by yourself.

Regards
   Jens

Haider Arafat wrote:
> I am not able to use NDSolve to integrate a differential equation of the 
> form
> 
> u''(t) + a u(t) == b u(t-tau);
> u(0) == u0;
> u'(0)==udot0;
> 
> where tau, a, and b are all constants. Is there any way to numerically 
> integrate this type of equations
> in Mathematica.
> 
> Any help is appreciated,
> 
> Haider Arafat 
> 
> 
> 


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