M. Langer and A. Luger,
Scalar generalized Nevanlinna functions: realizations with block operator matrices,
Oper. Theory Adv. Appl. 162 (2006), 253–276
Abstract:
In this paper a concrete realization for a scalar generalized Nevanlinna function
q∈Nκ is given using the realizations
of the factors in the basic factorization of q.
Some cases are discussed in more detail and the representing operators are
given as block operator matrices.