Results 41 to 50 of about 78,217 (127)

Poincaré series for modular graph forms at depth two. Part I. Seeds and Laplace systems

open access: yesJournal of High Energy Physics, 2022
We derive new Poincaré-series representations for infinite families of non-holomorphic modular invariant functions that include modular graph forms as they appear in the low-energy expansion of closed-string scattering amplitudes at genus one.
Daniele Dorigoni   +2 more
doaj   +1 more source

Sign changes of Fourier coefficients of Siegel cusp forms of degree two on Hecke congruence subgroups

open access: yes, 2017
In this article, the authors give a lower bound on the number of sign changes of Fourier coefficients of a non-zero degree two Siegel cusp form of even integral weight on a Hecke congruence subgroup.
Gun, S., Sengupta, J.
core   +1 more source

On the arithmetic nature of coefficients of multiplicative eta-functions

open access: yesВестник Самарского университета: Естественнонаучная серия
In the article we study the arithmetic nature of the coefficients of multiplicative eta-products, also called McKay functions. For some functions it is possible to establish Hecke correspondence between the coefficients of McKay and Hecke grossen ...
G. V. Voskresenskaya
doaj   +1 more source

Products of Eisenstein series and Fourier expansions of modular forms at cusps

open access: yes, 2018
We show, for levels of the form $N = p^a q^b N'$ with $N'$ squarefree, that in weights $k \geq 4$ every cusp form $f \in \mathcal{S}_k(N)$ is a linear combination of products of certain Eisenstein series of lower weight.
Dickson, Martin, Neururer, Michael
core   +1 more source

On joint approximation of analytic functions by nonlinear shifts of zeta-functions of certain cusp forms

open access: yesNonlinear Analysis, 2020
In the paper, joint discrete universality theorems on the simultaneous approximation of a collection of analytic functions by a collection of discrete shifts of zeta-functions attached to normalized Hecke-eigen cusp forms are obtained.
Antanas Laurinčikas   +2 more
doaj   +1 more source

Quantitative quantum ergodicity and the nodal domains of Maass-Hecke cusp forms [PDF]

open access: yes, 2016
We prove a quantitative statement of the quantum ergodicity for Hecke--Maass cusp forms on the modular surface. As an application of our result, along a density $1$ subsequence of even Hecke--Maass cusp forms, we obtain a sharp lower bound for the $L^2 ...
Jung, Junehyuk
core  

Cluster boundary layer measurements and optical observations at magnetically conjugate sites [PDF]

open access: yesAnnales Geophysicae, 2001
The Cluster spacecraft experienced several boundary layer encounters when flying outbound from the magnetosphere to the magnetosheath in the dusk sector on 14 January 2001.
J. Moen   +10 more
doaj   +1 more source

Co-existing Dental Anomalies - Talon Cusp and Supernumerary Tooth - A Case Report

open access: yesJournal of Indian Academy of Oral Medicine and Radiology, 2004
Supernumerary tooth is a common dental anomaly present in both maxilla and mandible. It may manifest as an isolated dental anomaly or as a feature of a syndrome. Talon cusp is another dental anomaly and presents as an accessory cusp in both deciduous and
Elizabeth Joshua   +4 more
doaj  

Extension of the discrete universality theorem for zeta-functions of certain cusp forms

open access: yesNonlinear Analysis, 2018
In the paper, an universality theorem on the approximation of analytic functions by generalized discrete shifts of zeta functions of Hecke-eigen cusp forms is obtained.
Antanas Laurinčikas   +2 more
doaj   +1 more source

Hecke operators on period functions for the full modular group

open access: yes, 2004
Matrix representations of Hecke operators on classical holomorphical cusp forms and corresponding period polynomials are well known. In this article we define Hecke operators on period functions and show that they correspond to the Hecke operators on ...
Mühlenbruch, Tobias
core   +1 more source

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