arXiv research

Proves Laplacian and Lichnerowicz Laplacian are sectorial in weighted Hölder spaces.

Paper generalizes CR Obata theorem to weighted Sasakian manifolds.

Paper investigates rigidity phenomena for weighted Ricci curvature bounds with Laplacian comparison theorem.

The paper sets up eigenvalue comparison theorems for specific Laplacians on manifolds.

Paper proves Faber-Krahn inequalities for weighted Laplacian eigenvalues.

In this paper, we obtain "universal" inequalities for eigenvalues of the weighted Hodge Laplacian on a compact self-shrinker of Euclidean space. These inequalities generalize the Yang-type and Levitin-Parnovski inequalities for eigenvalues of the Laplacian and Laplacian. From the recursion formula of Cheng and Yang \ci…

The paper explores inequalities between eigenvalues on Riemannian manifolds.

In this paper, we develop a novel weighted Laplacian method, which is partially inspired by the theory of graph Laplacian, to study recent popular graph problems, such as multilevel graph partitioning and balanced minimum cut problem, in a more convenient manner. Since the weighted Laplacian strategy inherits the virtu…

Upper bounds found for eigenvalues of weighted Steklov and (p,q)-Laplacian problems.

Study uses graph Laplacians to analyze surface links.

New method clusters hypergraphs using weighted random walks and Laplacians.

Study eigenvalues of a generalized p-Laplacian on forms.

This paper uses the technology of weighted and regular triangulations to study discrete versions of the Laplacian on piecewise Euclidean manifolds. Regular triangulations are studied in some detail, including flip algorithms. The Laplacian is then studied as an operator on functions of the vertices as a generalized wei…

Study shows rates for Laplacian-eigenmap methods in nonparametric regression.

Eigenvalue estimates for weighted manifolds with applications.

Sharp inequality on Siegel domain involving weighted norms and sub-Laplacian.

We investigate the distribution of eigenvalues of the weighted Laplacian on closed weighted Riemannian manifolds of nonnegative Bakry-Émery Ricci curvature. We derive some universal inequalities among eigenvalues of the weighted Laplacian on such manifolds. These inequalities are quantitative versions of the previous t…

Under a spectral assumption on the Laplacian of a Poincaré--Einstein manifold, we establish an energy inequality relating the energy of a fractional GJMS operator of order $2γ\in(0,2)$ or $2γ\in(2,4)$ and the energy of the weighted conformal Laplacian or weighted Paneitz operator, respectively. This spectral assumption…

The p-Laplacian Transformer improves transformer models by assigning higher attention weights to tokens in close proximity.

The paper finds upper bounds for eigenvalues of a weighted Laplacian.

We obtain upper estimates for the bottom (that is, greatest lower bound) of the essential spectrum of weighted Laplacian operator of a weighted manifold under assumptions of the volume growth of their geodesic balls and spheres. Furthermore, we find examples where the equality occurs in the estimates obtained. As a con…

We discuss optimal lower bounds for eigenvalues of Laplacians on weighted graphs. These bounds are formulated in terms of the geometry and, more specifically, the inradius of subsets of the graph. In particular, we study the first non-zero eigenvalue in the finite volume case and the first eigenvalue of the Dirichlet L…

Let $M$ be an $n$-dimensional closed Riemannian manifold with metric $g$, $dμ=e^{-φ(x)}dν$ be the weighted measure and $Δ_{p,φ}$ be the weighted $p$-Laplacian. In this article we will investigate monotonicity for the first eigenvalue problem of the weighted $p$-Laplace operator acting on the space of functions along th…

We consider a complete noncompact smooth Riemannian manifold $M$ with a weighted measure and the associated drifting Laplacian. We demonstrate that whenever the $q$-Bakry-Émery Ricci tensor on $M$ is bounded below, then we can obtain an upper bound estimate for the heat kernel of the drifting Laplacian from the upper b…

Novel Haar-Laplacian for directed graphs enhances spectral graph applications.

In this short note we compare the weighted Laplacians on real and complex (Kähler) metric measure spaces. In the compact case Kähler metric measure spaces are considered on Fano manifolds for the study of Kähler-Einstein metrics while real metric measure spaces are considered with Bakry-Émery Ricci tensor. There are tw…

Derives integral formula for differential forms on compact spaces with applications.

The paper explores inequalities on weighted Riemannian manifolds with boundary.

Study connects weighted isoperimetric problems to nonlocal elliptic operator extensions.

A checkerboard graph of a special diagram of an oriented link is made a directed, edge-weighted graph in a natural way so that a principal minor of its Laplacian matrix is a Seifert matrix of the link. Doubling and weighting the edges of the graph produces a second Laplacian matrix such that a principal minor is an Ale…

Paper proves a new isoperimetric inequality for Steklov eigenvalues.

The paper develops heat kernel comparison theorems and applies them to spectral geometry.

We study the heat trace for both the drifting Laplacian as well as Schrödinger operators on compact Riemannian manifolds. In the case of a finite regularity potential or weight function, we prove the existence of a partial (six term) asymptotic expansion of the heat trace for small times as well as a suitable remainder…

The paper proves a Laplacian comparison theorem on weighted Riemannian manifolds and applies it to diffusion processes.

The purpose of this paper is to provide a new proof of Bando-Mabuchi's uniqueness theorem of Kähler Einstein metrics on Fano manifolds, based on Chen's weak C^{1,1} geodesic without using any further regularities. Unlike the smooth case, the lack of regularities on the geodesic forbids us to use spectral formula of the…

The paper proves gradient estimates for a weighted p-Laplacian equation on Riemannian manifolds.

New random feature maps for Laplacian and related kernels.

Study shows instability of Kähler Ricci solitons and stability of orbifold singularities.

Study eigenvalues of drift Laplacian on symmetric self-shrinkers in R^3.

Combined with our previous work \cite{LW19eigenvalue}, we prove sharp lower bound estimates for the first nonzero eigenvalue of the weighted $p$-Laplacian with $1< p< \infty$ on a compact Bakry-Émery manifold $(M^n,g,f)$, without boundary or with a convex boundary and Neumann boundary condition, satisfying $\text{Ric}+…

Sharp gradient estimates for a weighted p-Laplacian equation on metric measure spaces.

Study geometric and topological properties of Finsler manifolds with weighted Ricci curvature bounds.

This short note aims at (re)proving that the symmetrically normalized graph Laplacian $L=\Id - D^{-1/2}WD^{-1/2}$ (from a graph defined from a Gaussian weighting kernel on a sampled smooth manifold) converges towards the continuous Manifold Laplacian when the sampling become infinitely dense. The convergence rate with …

New lower bounds of the first nonzero eigenvalue of the weighted $p$-Laplacian are established on compact smooth metric measure spaces with or without boundaries. Under the assumption of positive lower bound for the $m$-Bakry--Émery Ricci curvature, the Escober--Lichnerowicz--Reilly type estimates are proved; under the…

This paper concerns the $L^2$ essential spectrum of the Laplacian $Δ$ and the drift Laplacian $Δ_f$ on complete Riemannian manifolds endowed with a weighted measure $e^{-f}d\;vol_g$. We prove that the essential spectrum of the drift Laplacian $Δ_f$ is $[0,+\infty)$ provided the Bakry-Émery curvature tensor $Ric_f$ is …

Graph Laplacians computed from weighted adjacency matrices are widely used to identify geometric structure in data, and clusters in particular; their spectral properties play a central role in a number of unsupervised and semi-supervised learning algorithms. When suitably scaled, graph Laplacians approach limiting cont…

Paper derives inequalities for eigenvalues of Witten-Laplacian under fixed volume constraint.

Paper develops methods for estimating gradients of Finslerian Schrödinger equations.