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We investigate the boundary behavior of variational solutions of Dirichlet problems for prescribed mean curvature equations at smooth boundary points where certain boundary curvature conditions are satisfied (which preclude the existence of…

偏微分方程分析 · 数学 2019-01-30 Mozhgan , Entekhabi , Kirk E. Lancaster

We study Brakke's mean curvature flow with obstacles and with a right-angle boundary condition. Assuming that the obstacles have $C^{1,1}$-boundaries we prove that a weak solution exists globally in time. To show the existence we apply the…

偏微分方程分析 · 数学 2024-04-08 Katerina Nik , Keisuke Takasao

The Triple-Deck equations are a classical boundary layer model which describes the asymptotics of a viscous flow near the separation point, and the Couette flow is an exact stationary solution to the Triple-Deck equations. In this paper we…

偏微分方程分析 · 数学 2024-05-20 Sameer Iyer , Yasunori Maekawa

In this paper we study the pseudolocality theorems of Ricci flows on incomplete manifolds. We prove that if a ball with its closure contained in an incomplete manifold has the small scalar curvature lower bound and almost Euclidean…

微分几何 · 数学 2023-08-30 Liang Cheng

This paper investigates the short-time existence and uniqueness of Ricci flow solutions on Finsler manifolds. The main results of this paper are theorems demonstrating the short-time existence of the flow solution for $n$-dimensional…

微分几何 · 数学 2023-04-07 Behroz Bidabad , Maral K. Sedaghat

We give an overview of the existence and regularity results for curvature flows and how these flows can be used to solve some problems in geometry and physics.

微分几何 · 数学 2010-07-22 Claus Gerhardt

In this paper, a novel immersed boundary method is developed, validated, and applied. Through devising a second-order three-step flow reconstruction scheme, the proposed method is able to enforce the Dirichlet, Neumann, Robin, and Cauchy…

流体动力学 · 物理学 2018-09-10 Huangrui Mo , Fue-Sang Lien , Fan Zhang , Duane S. Cronin

We find a local solution to the Ricci flow equation under a negative lower bound for many known curvature conditions. The flow exists for a uniform amount of time, during which the curvature stays bounded below by a controllable negative…

微分几何 · 数学 2018-06-13 Yi Lai

In this paper, we investigate the problem of finding minimal graphs in $M^n\times\mathbb R$ with general boundary conditions using a variational approach. We look at so called generalized solutions of the Dirichlet Problem that minimize a…

微分几何 · 数学 2013-11-18 Matthew McGonagle , Ling Xiao

Motivated by the recent work of Lamm and Simon, in this work we study the short-time existence theory of Ricci-Deturck flow starting from rough metrics which are bi-Lipschitz and have small local scaling invariant gradient concentration. As…

微分几何 · 数学 2022-04-18 Jianchun Chu , Man-Chun Lee

In this work, we use the Ricci flow approach to study the gap phenomenon of Riemannian manifolds with non-negative curvature and sub-critical scaling invariant curvature decay. The first main result is a quantitative Ricci flow existence…

微分几何 · 数学 2023-08-15 Pak-Yeung Chan , Man-Chun Lee

In this paper, we propose a new assumption (1.2) that involves a small oscillation and $C^2$ norms for maps from smooth bounded domains into Euclidean spaces. Furthermore, by assuming that the domain has non-negative Ricci curvature, we…

微分几何 · 数学 2025-07-01 Caiyan Li , Hengyu Zhou

We study the Dirichlet problem associated to the equation for self-similar surfaces for graphs over the Euclidean plane with a disk removed. We show the existence of a solution provided the boundary conditions on the boundary circle are…

微分几何 · 数学 2019-09-19 Xuan Hien Nguyen

We study deformations of Riemannian metrics on a given manifold equipped with a codimension-one foliation subject to quantities expressed in terms of its second fundamental form. We prove the local existence and uniqueness theorem and…

微分几何 · 数学 2011-08-16 Vladimir Rovenski , Pawel Walczak

We investigate the evolution of open curves with fixed endpoints under the curve shortening flow, which evolves curves in proportion to their curvature. Using a distance comparison of Huisken, we determine the long-term behavior of open…

微分几何 · 数学 2015-04-01 Paul T. Allen , Adam Layne , Katharine Tsukahara

In this paper we study the local regularity of closed surfaces immersed in a Riemannian 3-manifold flowing by Willmore flow. We establish a pair of concentration-compactness alternatives for the flow, giving a lower bound on the maximal…

微分几何 · 数学 2013-08-29 Jan Metzger , Glen Wheeler , Valentina-Mira Wheeler

We develop a new boundary condition for the weak inverse mean curvature flow, which gives canonical and non-trivial solutions in bounded domains. Roughly speaking, the boundary of the domain serves as an outer obstacle, and the evolving…

微分几何 · 数学 2025-02-10 Kai Xu

The geometry of a ball within a Riemannian manifold is coarsely controlled if it has a lower bound on its Ricci curvature and a positive lower bound on its volume. We prove that such coarse local geometric control must persist for a…

微分几何 · 数学 2017-07-03 Miles Simon , Peter M. Topping

In this paper, we consider a compact Riemannian manifold whose boundary is endowed with a Riemannian flow. Under a suitable curvature assumption depending on the O'Neill tensor of the flow, we prove that any solution of the basic Dirac…

微分几何 · 数学 2015-07-09 Fida El Chami , Nicolas Ginoux , Georges Habib , Roger Nakad

This article studies the Dirichlet problem for a class of degenerate fully nonlinear elliptic equations on Riemannian manifolds with \textit{mean concave} boundary in the sense that the mean curvature of the boundary is…

偏微分方程分析 · 数学 2020-06-16 Rirong Yuan