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I need to solve this third-order linear partial differential equation in Matlab:

d^2/dx^2 d/dy f(x,y) = f(x,y) - x*y Could you please help me to do this?

Thank you very much for your advise!

I need to solve this third-order linear partial differential equation in Matlab:equation:

d^2/dx^2 d/dy f(x,y) = f(x,y) - x*y Could you please help me to do this?

Thank you very much for your advise!

I need to solve this third-order linear partial differential equation:

d^2/dx^2 d/dy f(x,y) = f(x,y) - x*y Could you please help me to do this?

Thank you very much for your advise!