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🔍 david eppstein 📂 Mathematics 📄 Preprint
Showing 4844 results for "david eppstein" in Mathematics · Preprint
Mathematics Preprint PDF DOI

Harmonic Gauge on the Space of Riemannian Metrics and Its Role in the Ricci-DeTurck Flow

Stepanov Sergey · 2026

We develop a harmonic gauge on the space of Riemannian metrics and study its role in the variational and flow-theoretic structure of geometric analysis. We prove that the harmonic gauge eliminates div…

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Mathematics Preprint PDF DOI

Scalar-flat K\"ahler surfaces whose Weyl tensor annihilates the Ricci form

Andrzej Derdzinski, Sinhwi Kim, JeongHyeong Park · 2026

We conjecture that any scalar-flat K\"ahler surface in which the Weyl tensor acting on 2-forms annihilates the Ricci form must be either Ricci-flat or locally isometric to a Riemannian product of two …

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Mathematics Preprint PDF DOI

A colimit decomposition for the loop homology of polyhedral products

Lewis Stanton, Fedor Vylegzhanin · 2026

We show that the loop homology algebras of polyhedral products of the form $(\underline{X},\underline{*})^{\mathcal{K}}$ can be written as a colimit over the flagification of $\mathcal{K}$, and obtain…

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Mathematics Preprint PDF DOI

Sharp Spectral Bounds for the $p$-Laplacian and Polyharmonic Operators on Asymptotically Hyperbolic Manifolds

Samuel Perez-Ayala · 2026

We derive sharp bounds for three types of eigenvalue problems. First, we derive an upper bound for the first $p$-Dirichlet eigenvalue on conformally compact (CC) spaces. As a consequence, we show that…

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Mathematics Preprint PDF DOI

Sharp pathwise nonuniqueness for additive SDEs

Elias Hess-Childs, Keefer Rowan · 2026

We construct a family of velocity fields demonstrating the sharpness of the classical Zvonkin--Veretennikov--Davie strong well-posedness by noise regime. We consider stochastic differential equations …

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Mathematics Preprint PDF DOI

On Einstein-type manifold with cyclic parallel Ricci tensor

M. Andrade, H. Baltazar, A. da Silva, D. Tavares · 2026

In this article, we derive an integral formula involving the tensor $D_{ijk}$ for compact Einstein-type manifolds with constant scalar curvature. As an application, we classify three-dimensional compa…

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Mathematics Preprint PDF DOI

Discrete Einstein metrics on trees

Shuliang Bai, Bobo Hua · 2026

We establish the existence and uniqueness of discrete Einstein metrics on trees under Lin-Lu-Yau Ricci curvature using Perron-Frobenius theory. Notably, the existence of a positive-curvature Einstein …

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Mathematics Preprint PDF DOI

On homogeneous HKT manifolds and the Einstein condition

Lucio Bedulli, Lorenzo Marcocci · 2026

We consider homogeneous hypercomplex manifolds with a transitive action of a compact Lie group and we give a characterization of invariant HKT metrics on them. On every such hypercomplex manifold we p…

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Mathematics Preprint PDF DOI

Formulae for the Drazin inverse of Modified Tensors via the Einstein Product

Yue Zhao, Daochang Zhang, Dijana Mosic · 2026

This paper establishes exact expressions for the Drazin inverse of the modified tensor $\mathcal A-\mathcal C*_N\mathcal D^D*_N\mathcal B$ via the Einstein product, formulated using the Drazin inverse…

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Mathematics Preprint PDF DOI

Diameter estimates and Hitchin-Thorpe inequality for four-dimensional compact Quasi-Einstein manifolds

Samuel Belo · 2026

We study compact $m$-quasi-Einstein manifolds and derive geometric estimates relating the oscillation of the potential function to the diameter of the manifold. We obtain lower bounds for the diameter…

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Mathematics Preprint PDF DOI

On the conformal-biharmonic stability of the identity map of Einstein manifolds

Volker Branding, Simona Nistor, Cezar Oniciuc · 2026

The identity map of an Einstein manifold is a critical point of both the classical energy functional and the conformal-bienergy functional. In this paper, we investigate the conformal-biharmonic stabi…

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Mathematics Preprint PDF DOI

On Ricci forms of canonical metrics over noncompact complex manifolds

Hanzhang Yin · 2026

In this paper, we study several types of geometric problems related to the Ricci curvature on noncompact complex manifolds, such as the existence of K\"{a}hler-Einstein metrics on complete K\"{a}hler …

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Mathematics Preprint PDF DOI

The Steklov spectrum of convex polygonal domains II: investigating spectral determination

Emily B. Dryden, Carolyn Gordon, Javier Moreno, Julie Rowlett, Carlos Villegas-Blas · 2026

The extent to which the geometry of an object is determined by some associated spectral data is a longstanding problem. We investigate this problem in the context of the Steklov spectrum, focusing on …

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Mathematics Preprint PDF DOI

Extrapolation of max-stable random fields with Fr\'echet marginals

Vitalii Makogin, Evgeny Spodarev, Ilja Sukhanov · 2026

We propose a method for the prediction of stationary max--stable random fields with $\alpha$-Fr\'echet marginal distribution $H_\alpha$. The method is suitable to cope with heavy tails for $\alpha\in(…

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Mathematics Preprint PDF DOI

Bergman--Einstein Rigidity for Hartogs Domains over Bounded Homogeneous Domains

Roberto Mossa · 2026

We establish a rigidity theorem for the Bergman metric on Hartogs domains over bounded homogeneous domains. Let $\Omega\subset \mathbb C^n$ be a bounded homogeneous domain, let $K_\Omega$ denote its B…

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Mathematics Preprint PDF DOI

Algebraic redshift in the $C_2$-equivariant Adams spectral sequence

Paul Shick · 2026

We study $v_n$-periodic phenomena in $C_2$-equivariant stable homotopy through the lens of the $C_2$-equivariant Adams spectral sequence at the prime 2. In particular, we construct/detect certain clas…

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Mathematics Preprint PDF DOI

Remarks on Topological Rigidity of Real Moment-Angle Manifolds

Ioannis Gkeneralis · 2026

We study topological rigidity of real moment-angle manifolds associated to flag simplicial complexes. Using the cubical geometry arising from the Davis construction, we identify the universal cover wi…

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Mathematics Preprint PDF DOI

The scaling limit of random walk and the intrinsic metric on planar critical percolation

Irina {DJ}ankovic, Maarten Markering, Jason Miller, Yizheng Yuan · 2026

We consider critical site percolation ($p=p_c=1/2$) on the triangular lattice $\mathbf{T}$ in two dimensions. We show that the simple random walk on the clusters of open vertices converges in the scal…

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Mathematics Preprint PDF DOI

A short proof of near-linear convergence of adaptive gradient descent under fourth-order growth and convexity

Damek Davis, Dmitriy Drusvyatskiy · 2026

Davis, Drusvyatskiy, and Jiang showed that gradient descent with an adaptive stepsize converges locally at a nearly-linear rate for smooth functions that grow at least quartically away from their mini…

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Mathematics Preprint PDF DOI

Transversely K\"ahler almost contact metric Lie algebras

Giulia Dileo, Deniz Poyraz, Bayram Sahin · 2026

We study transversely K\"ahler almost contact metric Lie algebras $(\mathfrak{g},\varphi,\xi,\eta,g)$ such that the structure $1$-form $\eta$ is a contact form. They include both quasi Sasakian and an…

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