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We extend the results of Riemannian geometry over finite groups and provide a full classification of all linear connections for the minimal noncommutative differential calculus over a finite cyclic group. We solve the torsion-free and…

Mathematical Physics · Physics 2020-12-24 Arkadiusz Bochniak , Andrzej Sitarz , Paweł Zalecki

We study two aspects of the loop group formulation for isometric immersions with flat normal bundle of space forms. The first aspect is to examine the loop group maps along different ranges of the loop parameter. This leads to various…

Differential Geometry · Mathematics 2007-10-06 David Brander

We associate a natural $\lambda$-family ($\lambda \in \R \setminus \{0\} $) of flat Lagrangian immersions in $\C^n$ with non-degenerate normal bundle to any given one. We prove that the structure equations for such immersions admit the same…

Differential Geometry · Mathematics 2007-05-23 Chuu-Lian Terng , Erxiao Wang

A general study of minimal surfaces of the Riemannian product of two spheres S^2xS^2 is tackled. We stablish a local correspondence between (non-complex) minimal surfaces of S^2xS^2 and certain pair of minimal surfaces of the sphere S^3.…

Differential Geometry · Mathematics 2013-01-09 Francisco Torralbo , Francisco Urbano

In this paper, we prove that every confomal minimal immersion of an open Riemann surface into $\mathbb{R}^n$ for $n\ge 5$ can be approximated uniformly on compacts by conformal minimal embeddings. Furthermore, we show that every open…

Differential Geometry · Mathematics 2016-04-26 Antonio Alarcon , Franc Forstneric , Francisco J. Lopez

This is the sixth in a series of papers constructing examples of special Lagrangian m-folds in C^m. We present a construction of special Lagrangian cones in C^3 involving two commuting o.d.e.s, motivated by the first two papers of the…

Differential Geometry · Mathematics 2008-11-17 Dominic Joyce

Generalizing the Cauchy-Riemann equations, we construct the Osserman system of the first order for a pair $\left(f(x, y), g(x,y) \right)$ of two ${\mathbb{R}}$-valued functions on the domain $\Omega \subset {\mathbb{R}}^{2}$. The graph…

Differential Geometry · Mathematics 2017-06-20 Hojoo Lee

We construct constant mean curvature surfaces in euclidean space by gluing n half Delaunay surfaces to a non-degenerate minimal n-noid, using the DPW method.

Differential Geometry · Mathematics 2019-03-25 Martin Traizet

This paper constructs a family of constant mean curvature immersions of the thrice-punctured Riemann sphere into Euclidean 3-space with asymptotically Delaunay ends via loop group methods.

Differential Geometry · Mathematics 2007-05-23 Nicholas Schmitt

The Riemannian product of two hyperbolic planes of constant Gaussian curvature -1 has a natural K\"ahler structure. In fact, it can be identified with the complex hyperbolic quadric of complex dimension two. In this paper we study…

Differential Geometry · Mathematics 2025-08-29 Dong Gao , Joeri Van der Veken , Anne Wijffels , Botong Xu

We use a construction which we call generalized cylinders to give a new proof of the fundamental theorem of hypersurface theory. It has the advantage of being very simple and the result directly extends to semi-Riemannian manifolds and to…

Differential Geometry · Mathematics 2019-01-08 Christian Baer , Paul Gauduchon , Andrei Moroianu

In this paper, some new aspects related to Routh reduction of Lagrangian systems with symmetry are discussed. The main result of this paper is the introduction of a new concept of transformation that is applicable to systems obtained after…

Mathematical Physics · Physics 2012-06-11 B. Langerock , E. García-Toraño Andrés , F. Cantrijn

Minimal surfaces in the sub-Riemannian Heisenberg group can be constructed by means of a Riemannian approximation scheme, as limit of Riemannian minimal surfaces. We study the regularity of Lipschitz, non-characteristic minimal surfaces…

Analysis of PDEs · Mathematics 2008-04-23 Luca Capogna , Giovanna Citti , Maria Manfredini

The main theorem of this paper asserts that the inclusion of the space of projective Lagrangian planes into the space of Lagrangian submanifolds of complex projective space induces an injective homomorphism of fundamental groups. We…

Symplectic Geometry · Mathematics 2007-05-23 Meike Akveld , Dietmar Salamon

Let $S$ be a closed, orientable surface of genus $g\geq 2$. We consider Delaunay circle patterns on $S$ equipped with a complex projective structure. We prove that the space of complex projective structures on $S$ equipped with a Delaunay…

Geometric Topology · Mathematics 2025-08-22 Jean-Marc Schlenker

In this work we introduce a category of discrete Lagrange--Poincare systems LP_d and study some of its properties. In particular, we show that the discrete mechanical systems and the discrete mechanical systems obtained by the Lagrangian…

Differential Geometry · Mathematics 2020-09-22 Javier Fernandez , Cora Tori , Marcela Zuccalli

We present a method to construct a large family of Lagrangian surfaces in complex Euclidean plane by using Legendre curves in the 3-sphere and in the anti de Sitter 3-space or, equivalently, by using spherical and hyperbolic curves,…

Differential Geometry · Mathematics 2012-12-04 Ildefonso Castro , Bang-yen Chen

It is classically known that closed geodesics on a compact Riemann surface with a metric of negative curvature strictly minimize length in their free homotopy class. We'd like to generalize this to Lagrangian submanifolds in K\"ahler…

Differential Geometry · Mathematics 2007-05-23 Edward Goldstein

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

In the past decades, the authors made some systematic research on global and local properties of Willmore surfaces in terms of the DPW method. In this note we give a survey, mainly including the basic framework of the DPW method for the…

Differential Geometry · Mathematics 2024-05-20 Josef F. Dorfmeister , Peng Wang