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 :-)