English

Jensen polynomials associated with Wright's circle method: Hyperbolicity and Tur\'an inequalities

Number Theory 2023-07-24 v2

Abstract

We study the Fourier coefficients of functions satisfying a certain version of Wright's circle method with finitely many major arcs. We show that the Jensen polynomials associated with such Fourier coefficients are asymptotically hyperbolic, building on the framework of Griffin--Ono--Rolen--Zagier and others. Consequently, we prove that the Fourier coefficients asymptotically satisfy all higher-order Tur\'an inequalities. As an application, we apply our results to both (qt;qt)r(q^t;q^t)_\infty^{-r}, which counts rr-coloured partitions into parts divisible by tt, and to the function (qa;qp)1(q^{a};q^{p})_\infty^{-1} where pp is prime and 0a<p0\leq a<p, a ubiquitous function throughout number theory.

Keywords

Cite

@article{arxiv.2301.02492,
  title  = {Jensen polynomials associated with Wright's circle method: Hyperbolicity and Tur\'an inequalities},
  author = {Jashan Bal and Fern Haraldson and Joshua Males and Ian Thompson},
  journal= {arXiv preprint arXiv:2301.02492},
  year   = {2023}
}

Comments

Undergraduate research supported by the Manitoba eXperimental Mathematics Laboratory. Comments welcome! This iteration fixes some constants in Theorem 1.4 and its proof

R2 v1 2026-06-28T08:04:58.764Z