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We propose a torus model for high-contrast patches of optical flow. Our model is derived from a database of ground-truth optical flow from the computer-generated video \emph{Sintel}, collected by Butler et al.\ in \emph{A naturalistic open…

Computer Vision and Pattern Recognition · Computer Science 2020-07-14 Henry Adams , Johnathan Bush , Brittany Carr , Lara Kassab , Joshua Mirth

In this paper we will discuss how one may be able to use mean curvature flow to tackle some of the central problems in topology in 4-dimensions. We will be concerned with smooth closed 4-manifolds that can be smoothly embedded as a…

Differential Geometry · Mathematics 2012-08-30 Tobias Holck Colding , William P. Minicozzi , Erik Kjaer Pedersen

We would like to study new Ricci flow invariant curvature conditions. Specifically, we provide quantitative evidence for an unpublished conjecture of B\"ohm and Wilking. As an application, we study the topology of manifolds with pinched…

Differential Geometry · Mathematics 2024-12-19 Yiyan Xu

We prove regularity, global existence, and convergence of Lagrangian mean curvature flows in the two-convex case. Such results were previously only known in the convex case, of which the current work represents a significant improvement.…

Differential Geometry · Mathematics 2023-12-22 Chung-Jun Tsai , Mao-Pei Tsui , Mu-Tao Wang

This paper is concerned with properties of maximal solutions of the Ricci and cross curvature flows on locally homogeneous three-manifolds of type SL(2,R). We prove that, generically, a maximal solution originates at a sub-Riemannian…

Differential Geometry · Mathematics 2010-01-11 Xiaodong Cao , John Guckenheimer , Laurent Saloff-Coste

We consider the inverse mean curvature flow in Robertson-Walker spacetimes that satisfy the Einstein equations and have a big crunch singularity and prove that under natural conditions the rescaled inverse mean curvature flow provides a…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Claus Gerhardt

In this paper, we consider the inverse hessian quotient curvature flow with star-shaped initial hypersurface in anti-de Sitter-Schwarzschild manifold. We prove that the solution exists for all time, and the second fundamental form converges…

Differential Geometry · Mathematics 2017-01-10 Siyuan Lu

We consider the inverse curvature flows in the anti-de Sitter-Schwarzschild manifold with star-shaped initial hypersurface, driven by the 1-homogeneous curvature function. We show that the solutions exist for all time and the principle…

Differential Geometry · Mathematics 2018-10-23 Li Chen , Jing Mao

In this paper we give sufficient conditions that guarantee the meancurvature flow with free boundary on an embedded rotationally symmetric double cone develops a Type 2 curvature singularity. We additionally prove that Type 0 singularities…

Differential Geometry · Mathematics 2016-09-16 Glen Wheeler , Valentina-Mira Wheeler

We study the behaviour of the Ricci Yang-Mills flow for U(1) bundles on surfaces. We show that existence for the flow reduces to a bound on the isoperimetric constant. In the presence of such a bound, we show that on $S^2$, if the bundle is…

Differential Geometry · Mathematics 2009-07-31 Jeffrey Streets

In this paper, we define a class of new geometric flows on a complete Riemannian manifold. The new flow is related to the generalized (third order) Landau-Lifishitz equation. On the other hand it could be thought of a special case of the…

Differential Geometry · Mathematics 2013-12-03 Xiaowei Sun , Youde Wang

The purpose of this paper is twofold: firstly, to establish sufficient conditions under which the mean curvature flow supported on a hypersphere with exterior Dirichlet boundary exists globally in time and converges to a minimal surface,…

Differential Geometry · Mathematics 2014-06-02 Glen Wheeler , Valentina-Mira Wheeler

In this paper, we first investigate a new locally constrained mean curvature flow (1.5) and prove that if the initial hypersurface is of smoothly compact starshaped, then the solution of the flow (1.5) exists for all time and converges to a…

Differential Geometry · Mathematics 2021-11-02 J. Cui , P. Zhao

Viscous streaming flows generated by objects of constant curvature (circular cylinders, infinite plates) have been well understood. Yet, characterization and understanding of such flows when multiple body length-scales are involved has not…

Fluid Dynamics · Physics 2020-07-08 Yashraj Bhosale , Tejaswin Parthasarathy , Mattia Gazzola

In [8] Gerhardt proves longtime existence for the inverse mean curvature flow in globally hyperbolic Lorentzian manifolds with compact Cauchy hypersurface, which satisfy three main structural assumptions: a strong volume decay condition, a…

Differential Geometry · Mathematics 2012-11-22 Heiko Kröner

We study the mean curvature flow of smooth $m$-dimensional compact submanifolds with quadratic pinching in the Riemannian manifold $\mathbb{C}P^n$. Our main focus is on the case of high codimension, $k\geq 2$. We establish a codimension…

Differential Geometry · Mathematics 2023-11-16 Artemis A. Vogiatzi

For a mean curvature flow of complete graphical hypersurfaces $M_{t}=\operatorname{graph} u(\cdot,t)$ defined over domains $\Omega_{t}$, the enveloping cylinder is $\partial\Omega_{t}\times\mathbb{R}$. We prove the smooth convergence of…

Differential Geometry · Mathematics 2021-04-02 Wolfgang Maurer

We consider inverse curvature flows in $\Hh$ with star-shaped initial hypersurfaces and prove that the flows exist for all time, and that the leaves converge to infinity, become strongly convex exponentially fast and also more and more…

Differential Geometry · Mathematics 2014-06-06 Claus Gerhardt

Long time existence and convergence to a circle is proved for radial graph solutions to a mean curvature type curve flow in warped product surfaces (under a weak assumption on the warp potential of the surface). This curvature flow…

Differential Geometry · Mathematics 2016-10-20 Dylan Cant

In this paper we continue our study of finding the curvature flow of complete hypersurfaces in hyperbolic space with a prescribed asymptotic boundary at infinity. Our main results are proved by deriving a priori global gradient estimates…

Differential Geometry · Mathematics 2011-10-14 Ling Xiao
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