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In this paper, we use the conjugate surface construction to prove the existence of certain non-periodic symmetric immersed minimal surfaces. These surfaces have finite total curvature and embedded catenoid ends, and they have positive genus…

Differential Geometry · Mathematics 2008-04-29 Jorgen Berglund , Wayne Rossman

In 1960s, Almgren initiated a program to find minimal hypersurfaces in compact manifolds using min-max method. This program was largely advanced by Pitts and Schoen-Simon in 1980s when the manifold has no boundary. In this paper, we finish…

Differential Geometry · Mathematics 2017-08-25 Martin Li , Xin Zhou

We prove the existence of free boundary minimal annuli inside suitably convex subsets of three-dimensional Riemannian manifolds with nonnegative Ricci curvature $-$ including strictly convex domains of the Euclidean space $\mathbb{R}^3$.

Differential Geometry · Mathematics 2013-12-23 Davi Maximo , Ivaldo Nunes , Graham Smith

We prove that any complete, embedded minimal surface $M$ with finite topology in a homogeneous three-manifold $N$ has positive injectivity radius. When one relaxes the condition that $N$ be homogeneous to that of being locally homogeneous,…

Differential Geometry · Mathematics 2016-10-19 William H. Meeks , Joaquin Perez

For almost all Riemannian metrics (in the $C^\infty$ Baire sense) on a compact manifold with boundary $(M^{n+1},\partial M)$, $3\leq (n + 1)\leq 7$, we prove that, for any open subset $V$ of $\partial M$, there exists a compact, properly…

Differential Geometry · Mathematics 2019-09-05 Zhichao Wang

Let $M$ be a compact 3-dimensional Riemannian manifold with nonnegative Ricci curvature and a nonempty boundary $\partial M$. Fraser and Li \cite{Fraser&Li} established a compactness theorem for the space of compact, properly embedded…

Differential Geometry · Mathematics 2026-04-15 Pak Tung Ho , Juncheol Pyo , Keomkyo Seo

We construct closed embedded minimal surfaces in the round three-sphere, resembling two parallel copies of the equatorial two-sphere, joined by small catenoidal bridges symmetrically arranged either along two parallel circles of the…

Differential Geometry · Mathematics 2016-07-12 Nikolaos Kapouleas

We prove the existence of minimal surfaces in a bounded convex subset of $\mathbb R^3$, $\mathcal M$, intersecting the boundary of $\mathcal M$ with a fixed contact angle. The proof is based on a min-max construction in the spirit of…

Differential Geometry · Mathematics 2021-11-22 Luigi De Masi , Guido De Philippis

In this paper, continuing our previous work, we investigate the third gap problem in the Simon conjecture for closed minimal surfaces in the unit sphere. By developing refined third-order Simons-type integral identities and establishing new…

Differential Geometry · Mathematics 2026-04-14 Weiran Ding , Jianquan Ge , Fagui Li

The aim of this paper is to give an upper bound for the intrinsic diameter of a surface with boundary immersed in a conformally flat three dimensional Riemannian manifold in terms of the integral of the mean curvature and of the length of…

Differential Geometry · Mathematics 2023-03-20 Marco Flaim , Christian Scharrer

Building on work of Kapouleas and Yang, we construct sequences of minimal surfaces embedded in the round 3-sphere which converge to the Clifford torus counted with multiplicity two and have second fundamental form blowing up at every point…

Differential Geometry · Mathematics 2015-03-03 David Wiygul

J. C. C. Nitsche proved that any minimal disk satisfying the free boundary condition in the unit ball $B^3$ must be an equatorial flat disk. Later, Fraser and Schoen extended this rigidity theorem to higher dimensions and to ambient spaces…

Differential Geometry · Mathematics 2026-05-26 Elham Matinpour

Light reflection plays a crucial role in a number of modern technologies. In this paper, analytical expressions for maximal reflected power in any direction and for any polarization are given for generic planar structures made of a single…

Optics · Physics 2022-08-12 Mohamed Ismail Abdelrahman , Francesco Monticone

We construct embedded closed minimal surfaces in the round three-sphere, resembling two parallel copies of the Clifford torus, joined by m^2 small catenoidal bridges symmetrically arranged along a square lattice of points on the torus.

Differential Geometry · Mathematics 2007-05-23 Nicolaos Kapouleas , Seong-Deog Yang

In contrast with the 3-dimensional case (cf. \cite{RaMo}), where rotationally symmetric totally geodesic free boundary minimal surfaces have Morse index one; we prove in this work that the Morse index of a free boundary rotationally…

Differential Geometry · Mathematics 2021-03-11 Ezequiel Barbosa , José Maria Espinar

In this work, we study the space of complete embedded rotationally symmetric self-shrinking hypersurfaces in $\mathbb{R}^{n+1}$. First, using comparison geometry in the context of metric geometry, we derive explicit upper bounds for the…

Differential Geometry · Mathematics 2026-01-26 John Man Shun Ma , Ali Muhammad , Niels Martin Møller

We construct a complete, embedded minimal surface in euclidean 3-space which has unbounded Gaussian curvature. It has infinite genus, infinitely many catenoidal type ends and one limit end.

Differential Geometry · Mathematics 2010-06-18 Martin Traizet

In this paper we prove that a complete minimal surface immersed in H^2xR, with finite total curvature and two ends, each one asymptotic to a vertical geodesic plane, must be a horizontal catenoid. Moreover, we give a geometric description…

Differential Geometry · Mathematics 2015-02-11 Laurent Hauswirth , Barbara Nelli , Ricardo Sa Earp , Eric Toubiana

We consider minimal hypersurfaces inside the unit ball whose boundary on the sphere is a small perturbation of the link of a minimizing quadratic cone. We show that such minimal surfaces are uniquely determined by their boundary condition.…

Differential Geometry · Mathematics 2025-09-22 Vishnu Nandakumaran , Gábor Székelyhidi

In earlier work of NK new closed embedded smooth minimal surfaces in the round three-sphere $\mathbb{S}^3(1)$ were constructed, each resembling two parallel copies of the equatorial two-sphere $\mathbb{S}^2_{eq}$ joined by small catenoidal…

Differential Geometry · Mathematics 2017-07-27 Nikolaos Kapouleas , Peter McGrath