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Re: Integrating Differential Equations with Time Delay

• To: mathgroup at smc.vnet.net
• Subject: [mg75548] Re: Integrating Differential Equations with Time Delay
• From: dh <dh at metrohm.ch>
• Date: Sat, 5 May 2007 05:54:24 -0400 (EDT)
• References: <f1eqpt$59j$1@smc.vnet.net>

Hi Haider,

your equation is not an ordinary differential equation, but a so called 

delay differential equation. Although I have not tryed it,  a package to 

numerically solve this type can be found at:

http://library.wolfram.com/infocenter/MathSource/725/

You could also check:

http://forums.wolfram.com/student-support/topics/4593



hope this helps, Daniel



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 

> 

> 

>