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Jensen polynomials for the Riemann zeta function and other sequences

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arxiv 1902.07321 v2 pith:23LPRMZX submitted 2019-02-19 math.NT

classification math.NT
keywords polynomialszetafunctionhyperbolicityriemannjensenallowsgeneral
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abstract

In 1927 P\'olya proved that the Riemann Hypothesis is equivalent to the hyperbolicity of Jensen polynomials for the Riemann zeta function $\zeta(s)$ at its point of symmetry. This hyperbolicity has been proved for degrees $d\leq 3$. We obtain an asymptotic formula for the central derivatives $\zeta^{(2n)}(1/2)$ that is accurate to all orders, which allows us to prove the hyperbolicity of a density $1$ subset of the Jensen polynomials of each degree. Moreover, we establish hyperbolicity for all $d\leq 8$. These results follow from a general theorem which models such polynomials by Hermite polynomials. In the case of the Riemann zeta function, this proves the GUE random matrix model prediction in derivative aspect. The general theorem also allows us to prove a conjecture of Chen, Jia, and Wang on the partition function.

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  1. A new hyperbolicity wedge and a joint semicircle limit for Jensen polynomials of Riemann's $\xi$-function

    math.NT 2026-08 accept novelty 8.0 of 10

    For the Riemann xi-function, the Jensen polynomials J^{d,n} are hyperbolic whenever n^3 log^2(n+2) ≥ K d^5, and their scaled zeros converge to Wigner's semicircle law in this joint limit.

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