• Corpus ID: 235899094

A Jentzsch-Theorem for Kapteyn, Neumann, and General Dirichlet Series

@inproceedings{Bornemann2021AJF,
  title={A Jentzsch-Theorem for Kapteyn, Neumann, and General Dirichlet Series},
  author={Folkmar A. Bornemann},
  year={2021}
}
Comparing phase plots of truncated series solutions of Kepler’s equation by Lagrange’s power series with those by Bessel’s Kapteyn series strongly suggest that a Jentzsch-type theorem holds true not only for the former but also for the latter series: each point of the boundary of the domain of convergence in the complex plane is a cluster point of zeros of sections of the series. We prove this result by studying properties of the growth function of a sequence of entire functions. For series… 

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