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Recently Rohleder proposed a new variational approach to an inequality between the Neumann and Dirichlet eigenvalues in the simply connected planar case using the language of classical vector analysis. Writing his approach in terms of…

Differential Geometry · Mathematics 2025-01-30 Muravyev Mikhail

We introduce a novel concept of surface bound states in the continuum, i.e. surface modes embedded into the linear spectral band of a discrete lattice. We suggest an efficient method for creating such surface modes and the local bounded…

Pattern Formation and Solitons · Physics 2015-06-03 Mario I. Molina , Andrey E. Miroshnichenko , Yuri S. Kivshar

On a compact Riemannian manifold with boundary, we prove a spectral inequality for the bi-Laplace operator in the case of so-called "clamped" boundary conditions , that is, homogeneous Dirichlet and Neumann conditions simultaneously. We…

Analysis of PDEs · Mathematics 2017-12-01 Jérôme Le Rousseau , Luc Robbiano

In this article we explore the relationship between the systole and the diameter of closed hyperbolic orientable surfaces. We show that they satisfy a certain inequality, which can be used to deduce that their ratio has a (genus dependent)…

Geometric Topology · Mathematics 2023-04-03 Florent Balacheff , Vincent Despré , Hugo Parlier

Motivated by considerations of euclidean quantum gravity, we investigate a central question of spectral geometry, namely the question of reconstructability of compact Riemannian manifolds from the spectra of their Laplace operators. To this…

Differential Geometry · Mathematics 2017-12-01 Mikhail Panine , Achim Kempf

Although there is an extensive literature on the eigenvalues of high-dimensional sample covariance matrices, much of it is specialized to independent components (IC) models -- in which observations are represented as linear transformations…

Statistics Theory · Mathematics 2023-05-05 Siyao Wang , Miles E. Lopes

Initiated by the work of Uhlenbeck in late 1970s, we study questions about the existence, multiplicity and asymptotic behavior for minimal immersions of closed surface in some hyperbolic three-manifold, with prescribed conformal structure…

Differential Geometry · Mathematics 2020-12-04 Zheng Huang , Marcello Lucia , Gabriella Tarantello

In this paper, we establish a sharp lower bound for the spectrum of the Hodge Laplacian on K\"ahler hyperbolic manifolds. This bound is expressed explicitly in terms of the supremum norm of the 1-form associated with the K\"ahler hyperbolic…

Differential Geometry · Mathematics 2026-02-23 Ye-Won Luke Cho , Young-Jun Choi , Kang-Hyurk Lee

We study a class of oscillatory hypersingular integral operators associated to a radial hypersurface of the form $\Gamma(t)=(t,\varphi(t)), t\in\R{n}$. When $\varphi$ satisfies suitable curvature and monotonicity conditions, we prove…

Functional Analysis · Mathematics 2025-05-20 Sajin Vincent A W , Aniruddha Deshmukh , Vijay Kumar Sohani

In this note we present upper bounds for the variational eigenvalues of the $p$-Laplacian on smooth domains of complete $n$-dimensional Riemannian manifolds and Neumann boundary conditions, and on compact (boundaryless) Riemannian…

Spectral Theory · Mathematics 2021-09-17 Bruno Colbois , Luigi Provenzano

A spectral approach to building the exterior calculus in manifold learning problems is developed. The spectral approach is shown to converge to the true exterior calculus in the limit of large data. Simultaneously, the spectral approach…

Differential Geometry · Mathematics 2020-02-24 Tyrus Berry , Dimitrios Giannakis

We relate small 1-form Laplacian eigenvalues to relative cycle complexity on closed hyperbolic manifolds: small eigenvalues correspond to closed geodesics no multiple of which bounds a surface of small genus. We describe potential…

Geometric Topology · Mathematics 2016-11-14 Michael Lipnowski , Mark Stern

Eigenfunctions of the Laplace-Beltrami operator on a hyperboloid are studied in the spirit of the treatment of the spherical harmonics by Stein and Weiss. As a special case, a simple self-contained proof of Laplace's integral for a Legendre…

Spectral Theory · Mathematics 2009-03-12 Amritanshu Prasad , M. K. Vemuri

We study spectral properties of divergence form elliptic operators $-\textrm{div} [A(z) \nabla f(z)]$ with the Neumann boundary condition in planar domains (including some fractal type domains), that satisfy to the quasihyperbolic boundary…

Analysis of PDEs · Mathematics 2020-04-24 Vladimir Gol'dshtein , Valeryi Pchelintsev , Alexander Ukhlov

We establish an identity for closed hyperbolic surfaces whose terms depend on the dilogarithms of the lengths of simple closed geodesics in all 3-holed spheres and 1-holed tori in the surface.

Geometric Topology · Mathematics 2011-04-29 Feng Luo , Ser-Peow Tan

Recent work in the literature has studied fourth-order elliptic operators on manifolds with boundary. This paper proves that, in the case of the squared Laplace operator, the boundary conditions which require that the eigenfunctions and…

High Energy Physics - Theory · Physics 2014-11-18 Giampiero Esposito , Alexander Yu. Kamenshchik

Our main result is that for all sufficiently large $x_0>0$, the set of commensurability classes of arithmetic hyperbolic 2- or 3-orbifolds with fixed invariant trace field $k$ and systole bounded below by $x_0$ has density one within the…

Geometric Topology · Mathematics 2018-11-14 Benjamin Linowitz , D. B. McReynolds , Paul Pollack , Lola Thompson

We give a diameter bound for fundamental domains for isometric actions of the fundamental group of a closed hyperbolic surface on a delta-hyperbolic space, where the bound depends on the hyperbolicity constant delta, the genus of the…

Group Theory · Mathematics 2012-07-10 Josh Barnard

We show that for any closed surface of genus greater than one and for any finite weighted graph filling the surface, there exists a hyperbolic metric which realizes the least Dirichlet energy harmonic embedding of the graph among a fixed…

Differential Geometry · Mathematics 2020-07-27 Toru Kajigaya , Ryokichi Tanaka

We obtain upper bounds for the eigenvalues of the Schr\"odinger operator $L=\Delta_g+q$ depending on integral quantities of the potential $q$ and a conformal invariant called the min-conformal volume. Moreover, when the Schr\"odinger…

Differential Geometry · Mathematics 2016-01-20 Asma Hassannezhad