Probabilistic limit theorems induced by the zeros of polynomials

Nils Heerten, Holger Sambale and Christoph Thäle

Mathematische Nachrichten, 2024, vol. 297, issue 5, 1772-1792

Abstract: Sequences of discrete random variables are studied whose probability generating functions are zero‐free in a sector of the complex plane around the positive real axis. Sharp bounds on the cumulants of all orders are stated, leading to Berry–Esseen bounds, moderate deviation results, concentration inequalities, and mod‐Gaussian convergence. In addition, an alternate proof of the cumulant bound with improved constants for a class of polynomials all of whose roots lie on the unit circle is provided. A variety of examples is discussed in detail.

Date: 2024
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https://doi.org/10.1002/mana.202300109

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