Titlebook: Advanced Quantum Mechanics; Materials and Photon Rainer Dick Textbook 2020Latest edition The Editor(s) (if applicable) and The Author(s), u

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Lecture Notes in Computer Sciencenamics to describe sudden impulses, mass points, or point charges. Both concepts are intimately connected to the completeness of eigenfunctions of self-adjoint operators. From the quantum mechanics perspective, the problem of completeness of sets of functions concerns the problem of enumeration of all possible states of a quantum system.