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When the domain is a complete noncompact Riemannian manifold with nonnegative Bakry--Emery Ricci curvature and the target is a complete Riemannian manifold with sectional curvature bounded above by a positive constant, by carrying out…

Differential Geometry · Mathematics 2024-12-09 Qun Chen , Hongbing Qiu

We continue studying a parabolic flow of almost K\"{a}hler structures introduced by Streets and Tian which naturally extends K\"{a}hler-Ricci flow onto symplectic manifolds. In the system of primarily the symplectic form, almost complex…

Differential Geometry · Mathematics 2018-08-30 Casey Lynn Kelleher

Analog to the classical result of Kazdan-Warner for the existence of solutions to the prescribed Gaussian curvature equation on compact 2-manifolds without boundary, it is widely known that if $(M,g_0)$ is a closed 4-manifold with zero…

Analysis of PDEs · Mathematics 2019-03-29 Quôc Anh Ngô , Hong Zhang

We prove that if a rescaled mean curvature flow is a global graph over the round cylinder with small gradient and converges super-exponentially fast, then it must coincide with the cylinder itself. We also show that the result is sharp with…

Differential Geometry · Mathematics 2025-10-28 Yiqi Huang , Xinrui Zhao

The theoretical and numerical models for gravity driven coating flow on upper cylinder and sphere are formulated. Using a perturbation method, the governing equations which depend on one Bond number $Bo$ are derived for a liquid film flow…

Fluid Dynamics · Physics 2017-08-04 Shuo Hou

In this paper we introduce a new geometric flow with rotational invariance and prove that, under this kind of flow, an arbitrary smooth closed contractible hypersurface in the Euclidean space Rn+1 (n, 1) converges to Sn in the C1-topology…

Analysis of PDEs · Mathematics 2011-09-06 De-Xing Kong , Qiang Ru

In this article, we introduce a new type of mean curvature flow for bounded star-shaped domains in space forms and prove its longtime existence, exponential convergence without any curvature assumption. Along this flow, the enclosed volume…

Differential Geometry · Mathematics 2013-09-23 Pengfei Guan , Junfang Li

In this paper, we study the skew mean curvature flow. The results are threefold. First, we prove the global regularity of solutions with initial data which are small perturbations of planes in Sobolev spaces. Second, we prove the modified…

Analysis of PDEs · Mathematics 2021-11-30 Ze Li

We study a class of deterministic flows in ${\mathbb R}^{d\times k}$, parametrized by a random matrix ${\boldsymbol X}\in {\mathbb R}^{n\times d}$ with i.i.d. centered subgaussian entries. We characterize the asymptotic behavior of these…

Probability · Mathematics 2026-04-21 Michael Celentano , Chen Cheng , Andrea Montanari

We prove rigidity theorems for ancient solutions of geometric flows of immersed submanifolds. Specifically, we find pinching conditions on the second fundamental form that characterize the shrinking sphere among compact ancient solutions…

Differential Geometry · Mathematics 2018-05-23 Susanna Risa , Carlo Sinestrari

We consider the mean curvature flow of a closed hypersurface in the complex or quaternionic projective space. Under a suitable pinching assumption on the initial data, we prove apriori estimates on the principal curvatures which imply that…

Differential Geometry · Mathematics 2016-10-04 Giuseppe Pipoli , Carlo Sinestrari

We study the convergence of an axially symmetric hypersurface evolving by volume preserving mean curvature flow. Assuming the surface is not pinching off along the axis at any time during the flow, and without any additional conditions, as…

Differential Geometry · Mathematics 2011-08-31 Maria Athanassenas , Sevvandi Kandanaarachchi

In this stub article, we show that laminar quasi-periodically developed flow is characterized by velocity and pressure modes which decay exponentially along the main flow direction. As the amplitudes of these modes exhibit streamwise…

Fluid Dynamics · Physics 2023-06-27 Geert Buckinx , Arthur Vangeffelen

We prove long-time existence for mean curvature flow of a smooth $n$-dimensional spacelike submanifold of an $n+m$ dimensional manifold whose metric satisfies the timelike curvature condition.

Differential Geometry · Mathematics 2020-07-23 Brendan Guilfoyle , Wilhelm Klingenberg

We define two stochastic analogs of a geometric flow on even-dimensional manifolds called $Q$-curvature flow, and use the theory of Dirichlet forms to construct weak solutions to both. The first of these flows, which we call the normalized…

Probability · Mathematics 2025-06-03 Jack Piazza

Phase-space features of the Wigner flow for an anharmonic quantum system driven by the harmonic oscillator potential modified by the addition of an inverse square (one-dimension Coulomb-like) contribution are analytically described in terms…

Quantum Physics · Physics 2018-12-05 Alex E. Bernardini

Recently, J. Streets and G. Tian introduced a natural way to evolve an almost-K\"ahler manifold called the symplectic curvature flow, in which the metric, the symplectic structure and the almost-complex structure are all evolving. We study…

Symplectic Geometry · Mathematics 2015-05-25 Jorge Lauret , Cynthia Will

In this paper, we produce explicit examples of mean curvature flow of (2m-1)-dimensional submanifolds which converge to (2m-2)-dimensional submanifolds at a finite time. These examples are a special class of hyperspheres in $\mathbb{C}^{m}$…

Differential Geometry · Mathematics 2023-09-11 Farnaz Ghanbari , Samreena

Chen's flow is a fourth-order curvature flow motivated by the spectral decomposition of immersions, a program classically pushed by B.-Y. Chen since the 1970s. In curvature flow terms the flow sits at the critical level of scaling together…

Differential Geometry · Mathematics 2019-01-24 Yann Bernard , Glen Wheeler , Valentina-Mira Wheeler

Given $ n \geq 2 $ and $ k \in \{2, \ldots , n\} $, we study the asymptotic behaviour of sequences of bounded $C^2$-domains of finite total curvature in $ \mathbb{R}^{n+1} $ converging in volume and perimeter, and with the $ k $-th mean…

Differential Geometry · Mathematics 2023-08-23 Mario Santilli