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Uniqueness theorems for operator-valued functions with positive imaginary part, and the singular spectrum in the selfadjoint Friedrichs model
Uniqueness theorems for operator-valued functions with positive imaginary part, and the singular spectrum in the selfadjoint Friedrichs model S. N. NABOKO I. Friedrichs model in perturbation theory and the operator-function M(2).Recall that for the operator L in the Friedrichs model we have so that L=x.(~<1/2).(1.1)where V is an integral operator …