arXiv subjects
Publications and source records attributed to Jean-Francois Burnol.
It is explained how to provide self-adjoint operators having scattering states forming a multiplicity one continuum and bound states whose corresponding eigenvalues have an asymptotic density equivalent to the one of the zeros of the Riemann zeta function. It is shown how this can be put into an integro-differential form of a type recently considered by Sierra.
The method of realizing certain self-reciprocal transforms as (absolute) scattering, previously presented in summarized form in the case of the Fourier cosine and sine transforms, is here applied to the self-reciprocal transform f(y)-> H(f)(x) = \int_0^\infty J_0(2\sqrt{xy})f(y) dy, which is isometrically equivalent to the Hankel transform of order zero and is related to the functional equations of the Dedekind zeta functions of imaginary quadratic fields. This also allows to re-prove and to extend theorems of de Branges and V. Rovnyak regarding square integrable functions which are self-or-skew reciprocal under the Hankel transform of order zero. Related integral formulae involving various Bessel functions are all established internally to the method. Fredholm determinants of the kernel J_0(2\sqrt{xy}) restricted to finite intervals (0,a) give the coefficients of first and second order differential equations whose associated scattering is (isometrically) the self-reciprocal transform H, closely related to the function Gamma(1-s)/Gamma(s). Remarkable distributions involved in this analysis are seen to have most natural expressions as (difference of) boundary values (i.e. hyperfunctions.) The present work is completely independent from the previous study by the author on the same transform H, which centered around the Klein-Gordon equation and relativistic causality. In an appendix, we make a simple-minded observation regarding the resolvent of the Dirichlet kernel as a Hilbert space reproducing kernel.
We study Hilbert space aspects of the Klein-Gordon equation in two-dimensional spacetime. We associate to its restriction to a spacelike wedge a scattering from the past light cone to the future light cone, which is then shown to be (essentially) the Hankel transform of order zero. We apply this to give a novel proof, solely based on the causality of this spatio-temporal wave propagation, of the theorem of de Branges and V. Rovnyak concerning Hankel pairs with a support property. We recover their isometric expansion as an application of Riemann's general method for solving Cauchy-Goursat problems of hyperbolic type.
Une danse avec co-Poisson: 1 Introduction: Sommes, Propriete de support, Co-sommes, Mellin et dzêta, Fonctions entieres et meromorphes 2 Docteur Poisson et Mister Co: Des theoremes de co-Poisson, Lemmes sur les sommes et les co-sommes, Preuve du theoreme 2.4, Un theoreme de Poisson presque sûr, Formule integrale de co-Poisson, Sommes de Riemann, Un autre theoreme de co-Poisson ponctuel 3 Etudes sur une formule de Müntz: Dzêta et Mellin, Distributions temperees et formule de Müntz, La transformation de Fourier de la fonction dzêta, Fonctions de carres integrables 4 Entrelacement et fonctions meromorphes: Convolution multiplicative, Le theoreme d'entrelacement, Transformation de Mellin, Propriete S et transformees de Mellin entieres, Fonctions moderees et propriete S, Distributions homogenes et quasi-homogenes, Propriete S-etendue et fonctions meromorphes, Exemples ----- A dance with co-Poisson: 1 Introduction 2 Dr Poisson and Mister Co 3 Studies on a formula of Müntz 4 Intertwining and meromorphic functions
We link together three themes which had remained separated so far: the Hilbert space properties of the Riemann zeros, the ``dual Poisson formula'' of Duffin-Weinberger (also named by us co-Poisson formula), and the ``Sonine spaces'' of entire functions defined and studied by de Branges. We determine in which (extended) Sonine spaces the zeros define a complete, or minimal, system. We obtain some general results dealing with the distribution of the zeros of the de Branges Sonine entire functions. We draw attention onto some distributions associated with the Fourier transform and which we introduced in our earlier works.
We study some of the interactions between the Fourier Transform and the Riemann zeta function (and Dirichlet-Dedekind-Hecke-Tate L-functions)
Dyson a associe aux determinants de Fredholm des noyaux de Dirichlet pairs (resp. impairs) une equation de Schrodinger sur un demi-axe et a employe les methodes du scattering inverse de Gel'fand-Levitan et de Marchenko, en tandem, pour etudier l'asymptotique de ces determinants. Nous avons propose suite a notre mise-au-jour de l'operateur conducteur de chercher a realiser la transformation de Fourier elle-meme comme un scattering, et nous obtenons ici dans ce but deux systemes de Dirac sur l'axe reel tout entier et qui sont associes intrinsequement, respectivement, aux transformations en cosinus et en sinus. (Dyson has associated with the Fredholm determinants of the even (resp. odd) Dirichlet kernels a Schrodinger equation on the half-axis and has used, in tandem, the Gel'fand-Levitan and Marchenko methods of inverse scattering theory to study the asymptotics of these determinants. We have proposed following our unearthing of the conductor operator to seek to realize the Fourier transform itself as a scattering, and we obtain here to this end two Dirac systems on the entire real axis which are intrinsically associated, respectively, to the cosine and to the sine transforms.)
Nous avons obtenu des formules explicites representant les fonctions E(z) apparaissant dans la theorie des ``Espaces de Sonine'' associes par de Branges a la transformation de Fourier.
We establish a uniform upper estimate for the values of zeta(s)/zeta(s+A), 0<= A, on the critical line (conditionally on the Riemann Hypothesis). We use this to give a variant, purely complex analytic, to Baez-Duarte's proof of a strengthened Nyman-Beurling criterion for the validity of the Riemann Hypothesis.
We construct in a Sonine Space of entire functions a subspace related to the Riemann zeta function and we show that the quotient contains vectors intrinsically attached to the non-trivial zeros and their multiplicities.
We slightly improve the lower bound of Baez-Duarte, Balazard, Landreau and Saias in the Nyman-Beurling formulation of the Riemann Hypothesis as an approximation problem. We construct Hilbert space vectors which could prove useful in the context of the so-called `Hilbert-Polya idea'.
A certain subspace of the Hilbert space of square-integrable functions on the unit interval has been considered by Nyman, Beurling, and others, with the result that the constant function 1 belongs to it if and only if the Riemann Hypothesis holds. I show that the product of |1 - 1/rho| taken over the zeros with real parts strictly greater than 1/2, counted with multiplicities, is the norm of the projection of 1 to this subspace. This provides a quantitative refinement to Nyman's theorem.
Weil has generalized the Riemann-von Mangoldt explicit formula linking the prime numbers with the zeros of the zeta function to the set-up of a general algebraic number field K and Dirichlet-Hecke L-function, revealing in the process the role played by the completions (finite and infinite) of K. We show how the local terms of these explicit formulae are explained by the dilaton invariant ``conductor operator'' log(|x|) + log(|y|). We also check Weil's positivity criterion under a support condition.
We establish Connes's local trace formula (related to the explicit formulae of number theory) for the quaternions. This is done as an application of a study of the central operator H = log(|x|) + log(|y|) in the context of invariant harmonic analysis. The multiplicative analysis of the additive Fourier transform gives a spectral interpretation to generalized ``Tate Gamma functions'' (closely akin to the Godement-Jacquet ``γ(s,π,ψ)'' functions.) The analysis of H leads furthermore to a spectral interpretation for the logarithmic derivatives of these Gamma functions (which are involved in ``explicit formulae''.)
I associate to a global field K a Lax-Phillips scattering which has the property of causality if and only if the Riemann Hypothesis holds for all the abelian L-functions of K. As a Hilbert space closure problem this provides an adelic variation on a theme initiated by Nyman and Beurling. The adelic aspects are related to previous work by Tate, Iwasawa and Connes.
I explain how the Lax-Phillips theory can be applied to a purely innovating time series and compute the corresponding scattering function. I then associate such a time series to an algebraic curve (of genus at least 1) over a finite field and show that the Riemann Hypothesis (proven long ago) holds if and only if the scattering is causal (this causality is not independently established, though).
This note adds three annexes to my previous paper math/9904044 Annex 1. A sufficient condition for self-adjointness Annex 2. Invariant closed operators on locally compact abelian groups Annex 3. The trace of Connes for quaternions This last item is a minor variation on the evaluation of Connes's trace (math/9811068), which is explained here in the setting of quaternions and can be applied also to any abelian local field.
I give a new derivation of the Explicit Formula for an arbitrary number field and abelian Dirichlet-Hecke character, which treats all primes in exactly the same way, whether they are discrete or archimedean, and also ramified or not. This is followed with a local study of a Hilbert space operator, the ``conductor operator'', which is expressed as H = log(|x|) + log(|y|) (where x and y are Fourier dual variables on a nu-adic completion of the number field). I also study the commutator operator K = i[log(|y|),log(|x|)] (which shares with H the property of complete dilation invariance, and turns out to be bounded), as well as the higher commutator operators. The generalized eigenvalues of these operators are given by the derivatives on the critical line of the Tate-Gel'fand-Graev Gamma function, which itself is in fact closely related to the additive Fourier Transform viewed in multiplicative terms. This spectral analysis is thus a natural continuation to Tate's Thesis in its local aspects. (combines my earlier papers math/9809119, math/9811040, math/9812012, one result added, new references)