Abstract.
In connection with an indefinite analogue of canonical systems of differential equations some subclasses N 0/Δ (Δ ∈ N0) of the Nevanlinna class N 0 come up. We give a criterion for a function to belong to N 0/Δ in terms of its poles and residues.
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Received 5 December 2000; in revised form 31 October 2001
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Langer, M., Woracek, H. A Characterization of Intermediate Weyl Coefficients. Mh Math 135, 137–155 (2002). https://doi.org/10.1007/s006050200011
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DOI: https://doi.org/10.1007/s006050200011