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MathGroup Archive 2007

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Re: Differential eqation: command set up

  • To: mathgroup at smc.vnet.net
  • Subject: [mg79668] Re: Differential eqation: command set up
  • From: Elias <agnosta at gmail.com>
  • Date: Wed, 1 Aug 2007 05:08:39 -0400 (EDT)

Thanks a lot, but to be honest, I am a bit confused. To set it on another way, I want to solve the diffusion equation, as displayed in the first message with conditions:

* u(t=0,x) =0 for ABS(x)<1
* u(t=0,x) =1 for ABS(x)>=1

Practically, initial conditions define a square well between  x=-1 and x=1 and for values of 1 everywhere outside that region. 

I know the analytical solution of this expression. But I was wondering how this equation can be defined in Mathematica, since I want to set up equations with similar conditions.

Thanks in advance :-)


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