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1 paper

math.FA2015

A system coupling and Donoghue classes of Herglotz-Nevanlinna functions

Sergey Belyi, Konstantin Makarov, Eduard Tsekanovskii

We study the impedance functions of conservative L-systems with the unbounded main operators. In addition to the generalized Donoghue class $\sM_κ$ of Herglotz-Nevanlinna functions…