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This is a survey about the contruction of warped products between (semi-)Riemannian manifolds and metric (measure) spaces. The resulting spaces will be semi-Riemannian manifolds, metric (measure) spaces or Lorentzian metric and metric…

微分几何 · 数学 2025-03-17 Christian Ketterer

We study the Riemann curvature tensor of (\kappa,\mu,\nu)-spaces when they have almost cosymplectic and almost Kenmotsu structures, giving its writing explicitly. This leads to the definition and study of a natural generalisation of the…

微分几何 · 数学 2013-08-06 Alfonso Carriazo , Verónica Martín-Molina

Motivated by the uniqueness problem for monostable semi-wavefronts, we propose a revised version of the Diekmann and Kaper theory of a nonlinear convolution equation. Our version of the Diekmann-Kaper theory allows 1) to consider new types…

经典分析与常微分方程 · 数学 2013-03-01 Maitere Aguerrea , Carlos Gomez , Sergei Trofimchuk

We study curvature dimension inequalities for the sub-Laplacian on contact Riemannian manifolds. This new curvature dimension condition is then used to obtain: 1) Geometric conditions ensuring the compactness of the underlying manifold…

微分几何 · 数学 2013-04-10 Fabrice Baudoin , Jing Wang

In the first part of this paper, we study the following non-homogeneous, locally constrained inverse curvature flow in Euclidean space $\mathbb{R}^{n+1}$, \begin{align*}…

微分几何 · 数学 2024-08-13 Yingxiang Hu , Mohammad N. Ivaki

We investigate the compact submanifolds in Riemannian space forms of nonnegative sectional curvature that satisfy a lower bound on the Ricci curvature, that bound depending solely on the length of the mean curvature vector of the immersion.…

微分几何 · 数学 2023-11-06 Marcos Dajczer , Theodoros Vlachos

Measure contraction property is one of the possible generalizations of Ricci curvature bound to more general metric measure spaces. In this paper, we discover sufficient conditions for a three dimensional contact subriemannian manifold to…

微分几何 · 数学 2014-02-20 Andrei Agrachev , Paul Lee

The problem of measurement in quantum mechanics is studied within the Entropic Dynamics framework. We discuss von Neumann and Weak measurements, wavefunction collapse, and Weak Values as examples of bayesian and entropic inference.

量子物理 · 物理学 2017-06-28 Kevin Vanslette , Ariel Caticha

We prove the existence of nonnegative weak solutions to a class of second and fourth order nonautonomous nonlinear evolution equations with an explicitly time-dependent mobility function posed on the whole space $\mathbb{R}^d$, for…

偏微分方程分析 · 数学 2016-04-27 Jonathan Zinsl

We prove a laplacian comparison theorem in the barrier sense for the function distance to the boundary of Riemannian manifolds with nonnegative Ricci curvature, area and mean curvature of the boundary bounded above. As an application we get…

度量几何 · 数学 2014-05-26 Raquel Perales

We study (generalized) cones over metric spaces, both in Riemannian and Lorentzian signature. In particular, we establish synthetic lower Ricci curvature bounds \`a la Lott-Villani-Sturm and Ohta in the metric measure case, and \`a la…

微分几何 · 数学 2026-03-25 Matteo Calisti , Christian Ketterer , Clemens Sämann

We provide an intrinsic formulation of the noncommutative differential geometry developed earlier by Chaichian, Tureanu, R. B. Zhang and the second author. This yields geometric definitions of covariant derivatives of noncommutative metrics…

微分几何 · 数学 2024-01-02 Haoyuan Gao , Xiao Zhang

We illustrate some novel contraction and regularizing properties of the Heat flow in metric-measure spaces that emphasize an interplay between Hellinger-Kakutani, Kantorovich-Wasserstein and Hellinger-Kantorvich distances. Contraction…

偏微分方程分析 · 数学 2019-04-23 Giulia Luise , Giuseppe Savaré

The curvature dimension condition CD(K,N), pioneered by Sturm and Lott--Villani, is a synthetic notion of having curvature bounded below and dimension bounded above, in the non-smooth setting. This condition implies a suitable…

微分几何 · 数学 2022-09-28 Mattia Magnabosco , Lorenzo Portinale , Tommaso Rossi

This paper concerns the convergence of empirical measures in high dimensions. We propose a new class of probability metrics and show that under such metrics, the convergence is free of the curse of dimensionality (CoD). Such a feature is…

概率论 · 数学 2023-09-19 Jiequn Han , Ruimeng Hu , Jihao Long

Considering space--time to be non-commutative, we study the evolution of the universe employing the approach of Newtonian cosmology. Generalizing the conservation of energy and the first law of thermodynamics to $\kappa$-deformed…

广义相对论与量子宇宙学 · 物理学 2023-07-31 E. Harikumar , Harsha Sreekumar , Suman Kumar Panja

Let $M$ be an $n$-dimensional compact connected manifold with boundary, $\kappa>0$ a constant and $1\leq q\leq n-1$ an integer. We prove that $M$ supports a Riemannian metric with the interior $q$-curvature $K_q\geq -q\kappa^2$ and the…

微分几何 · 数学 2018-09-20 Changwei Xiong

We consider non-linear evolution equations arising from mean-field limits of particle systems on discrete spaces. We investigate a notion of curvature bounds for these dynamics based on convexity of the free energy along interpolations in a…

概率论 · 数学 2020-06-04 Matthias Erbar , Max Fathi , André Schlichting

Let $\mathcal{C}(\mathcal{R},n,p,\Lambda,D,V_0)$ be the class of compact $n$-dimensional Riemannian manifolds with finite diameter $\leq D$, non-collapsing volume $\geq V_0$ and $L^p$-bounded $\mathcal{R}$-curvature condition…

微分几何 · 数学 2018-12-05 Conghan Dong

During the last decade Optimal Transport had a relevant role in the study of geometry of singular spaces that culminated with the Lott-Sturm-Villani theory. The latter is built on the characterisation of Ricci curvature lower bounds in…

度量几何 · 数学 2020-05-04 Fabio Cavalletti , Nicola Gigli , Flavia Santarcangelo
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