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We introduce abstract net spaces on directed sets and prove their embedding and interpolation properties. Typical examples of interest are lattices of irreducible unitary representations of compact Lie groups and of class I representations…

Functional Analysis · Mathematics 2015-10-06 Rauan Akylzhanov , Michael Ruzhansky

Given a sequence of Marcinkiewicz-Zygmund inequalities in $L_2$ on a compact space, Gr\"ochenig in \cite{G} discussed weighted least squares approximation and least squares quadrature. Inspired by this work, for all $1\le p\le\infty$, we…

Numerical Analysis · Mathematics 2024-03-01 Jiansong Li , Yun Ling , Jiaxin Geng , Heping Wang

In this paper, we derive from the supersymmetry of the Witten Laplacian Brascamp-Lieb's type inequalities for general differential forms on compact Riemannian manifolds with boundary. In addition to the supersymmetry, our results…

Spectral Theory · Mathematics 2017-02-23 Dorian Le Peutrec

We study a generalization of the classical Marcinkiewicz-Zygmund inequalities. We relate this problem to the sampling sequences in the Paley-Wiener space and by using this analogy we give sharp necessary and sufficient computable conditions…

Classical Analysis and ODEs · Mathematics 2010-07-08 Joaquim Ortega-Cerdà , Jordi Saludes

We prove equidistribution at shrinking scales for the monochromatic ensemble on a compact Riemannian manifold of any dimension. This ensemble on an arbitrary manifold takes a slowly growing spectral window in order to synthesize a random…

Probability · Mathematics 2019-02-15 Matthew de Courcy-Ireland

This paper contains a proof of a conjecture of Braverman concerning Laumon quasiflag spaces. We consider the generating function Z(m), whose coefficients are the integrals of the equivariant Chern polynomial (with variable m) of the tangent…

Algebraic Geometry · Mathematics 2009-11-25 Andrei Negut

This paper is concerned with "nice" compactifications of manifolds. Siebenmann's iconic dissertation characterized open manifolds M^m (m>5) compactifiable by addition of a manifold boundary. His theorem extends easily to cases where M^m is…

Geometric Topology · Mathematics 2018-11-06 Shijie Gu , Craig R. Guilbault

We study curvature invariants of a sub-Riemannian manifold (i.e., a manifold with a Riemannian metric on a non-holonomic distribution) related to mutual curvature of several pairwise orthogonal subspaces of the distribution, and prove…

Differential Geometry · Mathematics 2022-12-27 Vladimir Rovenski

The purpose of this paper is to establish that for any compact, connected C^{\infty} Riemannian manifold there exists a robust family of kernels of increasing smoothness that are well suited for interpolation. They generate Lagrange…

Classical Analysis and ODEs · Mathematics 2010-07-20 Thomas Hangelbroek , Fran J. Narcowich , Joe D. Ward

We consider the renormalized Bochner Laplacian acting on tensor powers of a positive line bundle on a compact symplectic manifold. We derive an explicit local formula for the spectral density function in terms of coefficients of the…

Differential Geometry · Mathematics 2020-12-08 Yuri A. Kordyukov

The author reviews his results on locally compact homogeneous spaces with inner metric, in particular, homogeneous manifolds with inner metric. The latter are isometric to homogeneous (sub-)Finslerian manifolds; under some additional…

Differential Geometry · Mathematics 2014-12-30 V. N. Berestovskii

We approximate the spectral data (eigenvalues and eigenfunctions) of compact Riemannian manifold by the spectral data of a sequence of (computable) discrete Laplace operators associated to some graphs immersed in the manifold. We give an…

Analysis of PDEs · Mathematics 2013-01-17 Erwann Aubry

We establish an equidistribution result for Ruelle resonant states on compact locally symmetric spaces of rank one. More precisely, we prove that among the first band Ruelle resonances there is a density one subsequence such that the…

Analysis of PDEs · Mathematics 2020-10-02 Colin Guillarmou , Joachim Hilgert , Tobias Weich

We give a classification of many closed Riemannian manifolds M whose universal cover possesses a nontrivial amount of symmetry. More precisely, we consider closed Riemannian manifolds $M$ such that Isom$(\widetilde{M})$ has noncompact…

Differential Geometry · Mathematics 2014-05-12 Wouter van Limbeek

We consider the problem of existence of polynomials with small norm. This range of problems has been extensively studied by many authors in the case of the unit circle (or a compact Abelian group), i.e. when the characters are bounded. In…

Functional Analysis · Mathematics 2015-05-12 A. Kushpel

We construct a compactification of the moduli spaces of abelian differentials on Riemann surfaces with prescribed zeroes and poles. This compactification, called the moduli space of multi-scale differentials, is a complex orbifold with…

Algebraic Geometry · Mathematics 2024-12-02 Matt Bainbridge , Dawei Chen , Quentin Gendron , Samuel Grushevsky , Martin Möller

We revisit the eigenvalue problem of the Dirichlet Laplacian on bounded domains in complete Riemannian manifolds. By building on classical results like Li-Yau's and Yang's inequalities, we derive upper and lower bounds for eigenvalues. For…

Differential Geometry · Mathematics 2025-10-14 Daguang Chen , Qing-Ming Cheng

Let $M$ be pseudo-Riemannian homogeneous Einstein manifold of finite volume, and suppose a connected Lie group $G$ acts transitively and isometrically on $M$. In this situation, the metric on $M$ induces a bilinear form…

Differential Geometry · Mathematics 2021-06-17 Wolfgang Globke , Yuri Nikolayevsky

This paper gives a survey of methods for the construction of space-frequency concentrated frames on Riemannian manifolds with bounded curvature, and the applications of these frames to the analysis of function spaces. In this general…

Functional Analysis · Mathematics 2016-01-01 Hans G. Feichtinger , Hartmut Führ , Isaac Z. Pesenson

We indicate a geometric relation between Laplace-Beltrami spectra and eigenfunctions on compact Riemannian symmetric spaces and the Borel-Weil theory using ideas from symplectic geometry and geometric quantization. This is done by…

Differential Geometry · Mathematics 2021-03-18 Dimitar Grantcharov , Gueo Grantcharov , Camilo Montoya