@Article{Hassi2016,
author = "Hassi, Seppo and Wietsma, Hendrik Luit",
title = "Minimal realizations of generalized Nevanlinna functions",
journal = "Opuscula Math.",
year = "2016",
volume = "36",
number = "6",
pages = "749--768",
doi = "http://dx.doi.org/10.7494/OpMath.2016.36.6.749",
url = "http://dx.doi.org/10.7494/OpMath.2016.36.6.749",
abstract = "Minimal realizations of generalized Nevanlinna functions that carry the information on their generalized poles of nonpositive type in an explicit form are established. These realizations are based on a modification of the basic canonical factorization of generalized Nevanlinna functions whereby the non-minimality problems in realizations that are based directly on the canonical factorization are circumvented.",
keywords = "generalized Nevanlinna functions, selfadjoint (multi-valued) operators, (minimal) realizations",
issn = "1232-9274"
}