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We establish a uniform entropy bound for simply connected Ricci shrinkers with a finite second homotopy group and a uniform curvature bound. Additionally, we extend the non-collapsing result to a broader class of smooth metric measure…

Differential Geometry · Mathematics 2024-12-19 Conghan Dong , Yu Li

In this article, we prove the mean convex neighborhood conjecture for the mean curvature flow of surfaces in $\mathbb{R}^3$. Namely, if the flow has a spherical or cylindrical singularity at a space-time point $X=(x,t)$, then there exists a…

Differential Geometry · Mathematics 2021-08-31 Kyeongsu Choi , Robert Haslhofer , Or Hershkovits

Motivated by the limiting behavior of an explicit class of compact ancient curve shortening flows, we prove codimension bounds for ancient mean curvature flows by their tangent flow at $-\infty$, generalizing a theorem for cylinders in…

Differential Geometry · Mathematics 2021-10-27 Douglas Stryker , Ao Sun

We show the uniqueness of strictly convex closed smooth self-similar solutions to the $\alpha$-Gauss curvature flow with $(1/n) < \alpha < 1+(1/n)$. We introduce a Pogorelov type computation, and then we apply the strong maximum principle.…

Differential Geometry · Mathematics 2016-09-20 Kyeongsu Choi , Panagiota Daskalopoulos

We make several improvements on the results of M.-T. Wang in [8] and his joint paper with M.-P. Tsui [7] concerning the long time existence and convergence for solutions of mean curvature flow in higher co-dimension. Both the curvature…

Differential Geometry · Mathematics 2009-02-19 Kuo-Wei Lee , Yng-Ing Lee

Direct numerical simulations are performed for the steady flow normal to a circular disk at the Reynolds number of 1000. Numerical simulations are conducted with different levels of simplification procedure by reducing the azimuthal…

Fluid Dynamics · Physics 2019-06-26 Xinliang Tian

In this paper, we obtain a rigidity result of $2$-dimensional complete lagrangian self-shrinkers with constant squared norm $|\vec{H}|^{2}$ of the mean curvature vector in the Euclidean space $\mathbb{R}^{4}$. The same idea is also used to…

Differential Geometry · Mathematics 2024-12-03 Zhi Li , Ruixin Wang , Guoxin Wei

We prove that for the mean curvature flow of two-convex hypersurfaces the intrinsic diameter stays uniformly controlled as one approaches the first singular time. We also derive sharp $L^{n-1}$-estimates for the regularity scale of the…

Differential Geometry · Mathematics 2017-10-31 Panagiotis Gianniotis , Robert Haslhofer

For an ancient solution of the mean curvature flow, we show that each time slice M_t is contained in an affine subspace with dimension bounded in terms of the density and the dimension of the evolving submanifold. Recall that an ancient…

Differential Geometry · Mathematics 2007-05-23 Maria Calle

Tha quantum electrodynamics of particles constrained to move on a plane is not a fully dimensionally reduced theory because the gauge fields through which they interact live in higher dimensions. By constraining the gauge field to the…

Superconductivity · Physics 2025-02-24 Yi-Hui Xing , Lin Zhuang , E. C. Marino , Wu-Ming Liu

This is the second paper in the series to study the generic dynamics of mean curvature flows. We study the initial perturbation of mean curvature flows, whose first singularity is modeled by an asymptotically conical shrinker. The…

Differential Geometry · Mathematics 2025-08-21 Ao Sun , Jinxin Xue

We consider ancient noncollapsed mean curvature flows in $\mathbb{R}^4$ whose tangent flow at $-\infty$ is a bubble-sheet. We carry out a fine spectral analysis for the bubble-sheet function $u$ that measures the deviation of the…

Differential Geometry · Mathematics 2021-07-12 Wenkui Du , Robert Haslhofer

In this paper, we classify all noncollapsed singularities of the mean curvature flow in $\mathbb{R}^4$. Specifically, we prove that any ancient noncollapsed solution either is one of the classical historical examples (namely…

Differential Geometry · Mathematics 2025-01-07 Kyeongsu Choi , Robert Haslhofer

We study the Morse index of self-shrinkers for the mean curvature flow and, more generally, of $f$-minimal hypersurfaces in a weighted Euclidean space endowed with a convex weight. When the hypersurface is compact, we show that the index is…

Differential Geometry · Mathematics 2018-03-23 Debora Impera , Michele Rimoldi , Alessandro Savo

We study self-expanding solutions $M^m\subset\mathbb{R}^{n}$ of the mean curvature flow. One of our main results is, that complete mean convex self-expanding hypersurfaces are products of self-expanding curves and flat subspaces, if and…

Differential Geometry · Mathematics 2020-05-13 Knut Smoczyk

We prove that codimension two surfaces satisfying a nonlinear curvature condition depending on normal curvature are smoothly deformed by mean curvature flow to round points.

Differential Geometry · Mathematics 2016-05-23 Charles Baker , Huy The Nguyen

It is shown that a recently conjectured form for the critical scaling function for planar self-avoiding polygons weighted by their perimeter and area also follows from an exact renormalization group flow into the branched polymer problem,…

Statistical Mechanics · Physics 2009-11-07 John Cardy

We provide several rigidity results for the Clifford torus in the class of compact self-shrinkers for Lagrangian mean curvature flow.

Differential Geometry · Mathematics 2012-12-04 Ildefonso Castro , Ana M. Lerma

G. Pipoli and C. Sinestrari considered the mean curvature flow starting from a closed submanifold in the complex projective space. They proved that if the submanifold is of small codimension and satisfies a suitable pinching condition for…

Differential Geometry · Mathematics 2020-12-15 Naoyuki Koike , Yoshiyuki Mizumura , Nana Uenoyama

We consider mean curvature flow of n-dimensional surface clusters. At (n-1)-dimensional triple junctions an angle condition is required which in the symmetric case reduces to the well-known 120 degree angle condition. Using a novel…

Analysis of PDEs · Mathematics 2015-06-05 Daniel Depner , Harald Garcke , Yoshihito Kohsaka
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