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Tag for differential equations satisfying boundary conditions at infinity, or with open boundary conditions, or defined on an unbounded domain.

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NDEigensystem cannot solve numerically the 3D Coulomb problem, while DSolve returns the righ...

After having derived by hand the eigenvalues and eigenfunctions for the 3D and 2D hydrogen atom, I want to solve the systems numerically using Mathematica. I need to do this because my next step is to …
Matthew Brunetti's user avatar