LIBROS DEL AUTOR: jan nesemann

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  • PT-Symmetric Schrodinger Operators with Unbounded Potentials
    Jan Nesemann
    Jan Nesemann studies relatively bounded perturbations of self-adjoint operators in Krein spaces with real spectrum. The main results provide conditions which guarantee the spectrum of the perturbed operator to remain real. Similar results are established for relatively form-bounded perturbations and for pseudo-Friedrichs extensions. The author pays pa...
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