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Standard Models of Abstract Intersection Theory for Operators in Hilbert Space

Grzegorz Banaszak, Yoichi Uetake (2015)

Bulletin of the Polish Academy of Sciences. Mathematics

For an operator in a possibly infinite-dimensional Hilbert space of a certain class, we set down axioms of an abstract intersection theory, from which the Riemann hypothesis regarding the spectrum of that operator follows. In our previous paper (2011) we constructed a GNS (Gelfand-Naimark-Segal) model of abstract intersection theory. In this paper we propose another model, which we call a standard model of abstract intersection theory. We show that there is a standard model of abstract intersection...

Sur un problème de Rényi et Ivić concernant les fonctions de diviseurs de Piltz

Rimer Zurita (2013)

Acta Arithmetica

Let Ω(n) and ω(n) denote the number of distinct prime factors of the positive integer n, counted respectively with and without multiplicity. Let d k ( n ) denote the Piltz function (which counts the number of ways of writing n as a product of k factors). We obtain a precise estimate of the sum ∑ n ≤ x , Ω ( n ) - ω ( n ) = q f ( n ) for a class of multiplicative functions f, including in particular f ( n ) = d k ( n ) , unconditionally if 1 ≤ k ≤ 3, and under some reasonable assumptions if k ≥ 4. The result also applies to f(n) = φ(n)/n (where φ is the totient...

Symétries spectrales des fonctions zêtas

Frédéric Paugam (2009)

Journal de Théorie des Nombres de Bordeaux

On définit, en réponse à une question de Sarnak dans sa lettre a Bombieri [Sar01], un accouplement symplectique sur l’interprétation spectrale (due à Connes et Meyer) des zéros de la fonction zêta. Cet accouplement donne une formulation purement spectrale de la démonstration de l’équation fonctionnelle due à Tate, Weil et Iwasawa, qui, dans le cas d’une courbe sur un corps fini, correspond à la démonstration géométrique usuelle par utilisation de l’accouplement de dualité de Poincaré Frobenius-équivariant...

The Lax-Phillips infinitesimal generator and the scattering matrix for automorphic functions

Yoichi Uetake (2007)

Annales Polonici Mathematici

We study the infinitesimal generator of the Lax-Phillips semigroup of the automorphic scattering system defined on the Poincaré upper half-plane for SL₂(ℤ). We show that its spectrum consists only of the poles of the resolvent of the generator, and coincides with the poles of the scattering matrix, counted with multiplicities. Using this we construct an operator whose eigenvalues, counted with algebraic multiplicities (i.e. dimensions of generalized eigenspaces), are precisely the non-trivial zeros...

The n-level densities of low-lying zeros of quadratic Dirichlet L-functions

Jake Levinson, Steven J. Miller (2013)

Acta Arithmetica

Previous work by Rubinstein and Gao computed the n-level densities for families of quadratic Dirichlet L-functions for test functions f̂₁, ..., f̂ₙ supported in ∑ i = 1 n | u i | < 2 , and showed agreement with random matrix theory predictions in this range for n ≤ 3 but only in a restricted range for larger n. We extend these results and show agreement for n ≤ 7, and reduce higher n to a Fourier transform identity. The proof involves adopting a new combinatorial perspective to convert all terms to a canonical form,...

Triple correlation of the Riemann zeros

J. Brian Conrey, Nina C. Snaith (2008)

Journal de Théorie des Nombres de Bordeaux

We use the conjecture of Conrey, Farmer and Zirnbauer for averages of ratios of the Riemann zeta function [11] to calculate all the lower order terms of the triple correlation function of the Riemann zeros. A previous approach was suggested by Bogomolny and Keating [6] taking inspiration from semi-classical methods. At that point they did not write out the answer explicitly, so we do that here, illustrating that by our method all the lower order terms down to the constant can be calculated rigourously...

Une approche hilbertienne de l’hypothèse de Riemann généralisée

Anne de Roton (2006)

Bulletin de la Société Mathématique de France

En généralisant dans [De Roton] le théorème de Beurling et Nyman à la classe de Selberg, nous avons reformulé l’hypothèse de Riemann généralisée en terme d’un problème d’approximation. Nous poursuivons ici ce travail de généralisation par l’étude d’une distance liée à ce problème. Nous donnons une minoration de cette distance, ce qui constitue une extension du travail de Burnol [7] et de celui de Báez-Duarte, Balazard, Landreau et Saias [2], travail qui concernait la fonction ζ de Riemann et que...

Upper bounds for the density of universality. II

Jörn Steuding (2005)

Acta Mathematica Universitatis Ostraviensis

We prove explicit upper bounds for the density of universality for Dirichlet series. This complements previous results [15]. Further, we discuss the same topic in the context of discrete universality. As an application we sharpen and generalize an estimate of Reich concerning small values of Dirichlet series on arithmetic progressions in the particular case of the Riemann zeta-function.

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