Abstract
In this paper, we study a rational function which plays an important role in several problems of interest (eigenvalue problems, linear control theory, ... ). Our main interest is to determine zero-free regions. We also derive upper and lower bounds for this function.
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Communicated by T.L. Freeman
The work of this author was partially supported by NSF grant DMS-9100238.
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Jones, J.W., Welfert, B.D. Zero-flee regions for a rational function with applications. Adv Comput Math 3, 265–289 (1995). https://doi.org/10.1007/BF03028371
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DOI: https://doi.org/10.1007/BF03028371