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 Author Comment/Response Martin Wijaya 12/15/12 09:42am In Response To 'Re: Re: Re: PDE with two variable'---------Dear Mr. Bill I have tried your suggestion and it is worked. However another error occured. I write it down like this: NDSolve[{Derivative[0, 1][u][z, t] == 0.1*Derivative[2, 0][u][z, t], u[z, 0] == 100, Derivative[1, 0][u][2, t] == 0}, u[z, t], {z, 0, 2}, {t, 0, 100}] And I got this message NDSolve::bcart: Warning: An insufficient number of boundary conditions have been specified for the direction of independent variable z. Artificial boundary effects may be present in the solution. and the output is: {{u[z,t]->InterpolatingFunction[{{0.,2.},{0.,100.}},<>][z,t]}} I tried to move on with this error to plot the result and I got this error: NDSolve::dsvar: 0.00014299999999999998` cannot be used as a variable. >> NDSolve::dsvar: 0.00014299999999999998` cannot be used as a variable. >> NDSolve::dsvar: 0.14300014285714285` cannot be used as a variable. >> General::stop: Further output of NDSolve::dsvar will be suppressed during this calculation. >> How should I solve this problem? Regards Martin WIjaya Attachment: NDSsolve practice.nb, URL: ,

 Subject (listing for 'PDE with two variable') Author Date Posted PDE with two variable Martin Wijaya 12/12/12 10:27am Re: PDE with two variable Bill Simpson 12/12/12 12:02pm Re: Re: PDE with two variable Martin Wijaya 12/13/12 09:33am Re: Re: Re: PDE with two variable Bill Simpson 12/13/12 11:02am Re: Re: Re: Re: PDE with two variable Martin Wijaya 12/15/12 09:42am Re: Re: Re: Re: Re: PDE with two variable Bill Simpson 12/16/12 1:46pm Re: Re: Re: Re: Re: Re: PDE with two variable Martin Wijaya 12/17/12 11:28am Re: PDE with two variable Martin Wijaya 12/17/12 00:18am Re: Re: PDE with two variable Bill Simpson 12/17/12 10:59am
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