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We analyze a real one-parameter family of quasiconformal deformations of a hyperbolic rational map known as {\em spinning}. We show that under fairly general hypotheses, the limit of spinning either exists and is unique, or else converges…

Dynamical Systems · Mathematics 2016-09-07 Kevin M. Pilgrim , Tan Lei

We prove an inequality for the curvature of level sets of minimal graphs having vanishing boundary values and show that if the boundary is concave, then all the level sets are concave.

Differential Geometry · Mathematics 2021-02-26 Allen Weitsman

A minimal separating set in a connected topological space $X$ is a subset $L \subset X$ with the property that $X \setminus L$ is disconnected, but if $L^{\prime}$ is a proper subset of $L$, then $X \setminus L^{\prime}$ is connected. Such…

Combinatorics · Mathematics 2025-07-17 Christopher N. Aagaard , J. J. P. Veerman

The strip map is a natural map from the arc complex of a bordered hyperbolic surface $S$ to the vector space of infinitesimal deformations of $S$. We prove that the image of the strip map is a convex hypersurface when $S$ is a surface of…

Geometric Topology · Mathematics 2015-06-29 François Guéritaud

We exhibit the first set of examples of non-bumpy metrics on the $(n+1)$-sphere ($2\leq n\leq 6$) in which the varifold associated with the two-parameter min-max construction must be a multiplicity-two minimal $n$-sphere. This is proved by…

Differential Geometry · Mathematics 2022-01-19 Zhichao Wang , Xin Zhou

We give a survey of various existence results for minimal Lagrangian graphs. We also discuss the mean curvature flow for Lagrangian graphs.

Differential Geometry · Mathematics 2013-03-05 S. Brendle

We consider the asymptotic behavior of properly embedded minimal surfaces in the product of the hyperbolic plane with the line, taking into account the fact that there is more than one natural compactification of this space. This provides a…

Differential Geometry · Mathematics 2015-06-10 Benoit Kloeckner , Rafe Mazzeo

It was shown by Ramanathan \cite{R} that any compact oriented non-simply-connected minimal surface in the three-dimensional round sphere admits at most a finite set of pairwise noncongruent minimal isometric immersions. Here we show that…

Differential Geometry · Mathematics 2015-07-15 M. Dajczer , Th. Vlachos

We study minimal Lagrangian surfaces in the complex hyperbolic quadric. We show that minimality of a Lagrangian surface is characterized by a loop of flat connections, which yields an associated $\mathbb S^1$-family of isometric…

Differential Geometry · Mathematics 2026-05-19 Shimpei Kobayashi , Sihao Zeng

In this paper, we prove that minimal hypersurfaces when $n\geq 3$ and nonzero constant mean curvature hypersurfaces when $n\geq2$ foliated by spheres in parallel horizontal hyperplanes in ${\mathbb{H}}^n \times \mathbb{R}$ must be…

Differential Geometry · Mathematics 2010-02-23 Keomkyo Seo

A digraph $H$ is a ``semi-strong minor'' of another, $G$, if a subdivision of $H$ can be obtained from a subdigraph of $G$ by contracting strongly-connected subdigraphs to single vertices. We will define a width measure of ``plane''…

Combinatorics · Mathematics 2026-04-02 Maria Chudnovsky , Paul Seymour

We show that arbitrarily small antisymmetric perturbations of the zero function are sufficient to produce the stickiness phenomenon for planar nonlocal minimal graphs (with the same quantitative bounds obtained for the case of even…

Analysis of PDEs · Mathematics 2022-06-22 Benjamin Baronowitz , Serena Dipierro , Enrico Valdinoci

E. Calabi and J. Cao showed that a closed geodesic of least length in a two-sphere with nonnegative curvature is always simple. Using min-max theory, we prove that for some higher dimensions, this result holds without assumptions on the…

Differential Geometry · Mathematics 2016-12-08 Antoine Song

Many classical results in algebraic geometry arise from investigating some extremal behaviors that appear among projective varieties not lying on any hypersurface of fixed degree. We study two numerical invariants attached to such…

Algebraic Geometry · Mathematics 2019-06-20 Edoardo Ballico , Emanuele Ventura

We construct new examples of immersed minimal surfaces with catenoid ends and finite total curvature, of both genus zero and higher genus. In the genus zero case, we classify all such surfaces with at most $2n+1$ ends, and with symmetry…

Differential Geometry · Mathematics 2008-04-29 Wayne Rossman

First we construct minimal hypersurfaces $M\subset\mathbf{R}^{n+1}$ in a neighborhood of the origin, with an isolated singularity but cylindrical tangent cone $C\times \mathbf{R}$, for any strictly minimizing strictly stable cone $C$ in…

Differential Geometry · Mathematics 2021-08-02 Gábor Székelyhidi

We define two transforms between minimal surfaces with non-circular ellipse of curvature in the 5-sphere, and show how this enables us to construct, from one such surface, a sequence of such surfaces. We also use the transforms to show how…

Differential Geometry · Mathematics 2007-05-23 J. Bolton , L. Vrancken

We establish general bounds on the topology of free boundary minimal surfaces obtained via min-max methods in compact, three-dimensional ambient manifolds with mean convex boundary. We prove that the first Betti number is lower…

Differential Geometry · Mathematics 2026-01-22 Giada Franz , Mario B. Schulz

In the recent paper \cite{DGNP} we have proved that the only stable $C^2$ minimal surfaces in the first Heisenberg group $\Hn$ which are graphs over some plane and have empty characteristic locus must be vertical planes. This result…

Differential Geometry · Mathematics 2009-03-26 Donatella Danielli , Nicola Garofalo , Duy-Minh Nhieu , Scott Pauls

Minimal surfaces arise as energy minimizers for fluid membranes and are thus found in a variety of biological systems. The tight lamellar structures of the endoplasmic reticulum and plant thylakoids are composed of such minimal surfaces in…

Differential Geometry · Mathematics 2021-02-19 Luiz C. B. da Silva , Efi Efrati