>Who knows how to solve the dif. Eq. in Mathematica 3.
>Here is the Eq. a Uxx == Ut
>where U(x,t), Uxx is the second derivade of the function in x and Ut is the first derivade in t.
>The solution is: Exp[at][A Sin[ax]+B Cos[ax]]
>Please mail me. Thanks,.
You cannot obtain a solution to a partial differential equation without first specifying boundary conditions. Your problem is underspecified.
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