Mariusz Iwaniuk

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Hi everyone.

I'm trying to solve the following PDE


but I'm getting this error:

Error, (in pdsolve/numeric/process_IBCs) initial/boundary conditions can only contain derivatives which are normal to the boundary, got (D[1, 1](w))(x, 0)

The PDE represents the bending of a thin plate.

See File:

Hi every body.

I want to solve a differential equation:


I have the initial conditions:


r(e)=A where A is parameter.



All in the file.


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