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We introduce a new method to construct a large family of Lagrangian surfaces in complex Euclidean plane by means of two planar curves making use of their usual product as complex functions and integrating the Hermitian product of their…

Differential Geometry · Mathematics 2018-02-12 Ildefonso Castro , Ana M. Lerma

Using Legendrian immersions and, in particular, Legendre curves in odd dimensional spheres and anti De Sitter spaces, we provide a method of construction of new examples of Hamiltonian-minimal Lagrangian submanifolds in complex projective…

Differential Geometry · Mathematics 2012-12-04 Ildefonso Castro , Haizhong Li , Francisco Urbano

We study those Lagrangian surfaces in complex Euclidean space which are foliated by circles or by straight lines. The former, which we call cyclic, come in three types, each one being described by means of, respectively, a planar curve, a…

Differential Geometry · Mathematics 2009-09-18 Henri Anciaux , Pascal Romon

We describe several families of Lagrangian submanifolds in the complex Euclidean space which are H-minimal, i.e. critical points of the volume functional restricted to Hamiltonian variations. We make use of various constructions involving…

Differential Geometry · Mathematics 2010-08-17 Henri Anciaux , Ildefonso Castro

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 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

We construct new special Lagrangian submanifolds in complex Euclidean space using a pair of minimal Legendrian submanifolds in odd-dimensional spheres and certain Lagrangian surface belonging to a family that can be considered as a…

Differential Geometry · Mathematics 2012-12-04 Ildefonso Castro , Francisco Urbano

We classify the Lagrangian orientable surfaces in complex space forms with the property that the ellipse of curvature is always a circle. As a consequence, we obtain new characterizations of the Clifford torus of the complex projective…

Differential Geometry · Mathematics 2015-06-26 Ildefonso Castro

We describe local similarities and global differences between minimal surfaces in Euclidean 3-space and constant mean curvature 1 surfaces in hyperbolic 3-space. We also describe how to solve global period problems for constant mean…

Differential Geometry · Mathematics 2008-04-29 Wayne Rossman

We prove an existence and uniqueness theorem about spherical helicoidal (in particular, rotational) surfaces with prescribed mean or Gaussian curvature in terms of a continuous function depending on the distance to its axis. As an…

Differential Geometry · Mathematics 2024-03-04 Ildefonso Castro , Ildefonso Castro-Infantes , Jesús Castro-Infantes

A surface $\Sigma \subset S^5 \subset \mathbb{C}^3$ is called \emph{special Legendrian} if the cone $0 \times \Sigma \subset \mathbb{C}^3$ is special Lagrangian. The purpose of this paper is to propose a general method toward constructing…

Differential Geometry · Mathematics 2007-05-23 Sung Ho Wang

We consider the complex hyperbolic quadric ${Q^*}^n$ as a complex hypersurface of complex anti-de Sitter space. Shape operators of this submanifold give rise to a family of local almost product structures on ${Q^*}^n$, which are then used…

Differential Geometry · Mathematics 2020-02-25 Joeri Van der Veken , Anne Wijffels

There are three complete plane geometries of constant curvature: spherical, Euclidean and hyperbolic geometry. We explain how a closed oriented surface can carry a geometry which locally looks like one of these. Focussing on the hyperbolic…

Algebraic Geometry · Mathematics 2024-06-14 Peter B. Gothen

We make observations about constant mean curvature surfaces in Euclidean 3-space and their dual surfaces, and the resulting pairs of surfaces in hyperbolic 3-space under the Lawson correspondence.

Differential Geometry · Mathematics 2012-06-26 Wayne Rossman , Magdalena Toda

We investigate helicoidal (screw) surfaces generated not only by regular curves but also by curves with singular points. For curves with singular points, it is useful to use frontals in the Euclidean plane. The helicoidal surface of a…

Differential Geometry · Mathematics 2024-10-29 N. Nakatsuyama , K. Saji , R. Shimada , M. Takahashi

The consideration of the so-called rotation minimizing frames allows for a simple and elegant characterization of plane and spherical curves in Euclidean space via a linear equation relating the coefficients that dictate the frame motion.…

Differential Geometry · Mathematics 2018-03-28 Luiz C. B. da Silva , José Deibsom da Silva

We propose the study of a conformally invariant functional for surfaces of complex projective plane which is closely related to the classical Willmore functional. We show that minimal surfaces of complex projective plane are critical for…

Differential Geometry · Mathematics 2007-05-23 Sebastian Montiel , Francisco Urbano

In this paper, we employ the loop group method to study the construction of minimal Lagrangian surfaces in the complex projective plane for which the surface is contractible. We present several new classes of minimal Lagrangian surfaces in…

Differential Geometry · Mathematics 2021-02-03 Josef F. Dorfmeister , Hui Ma

We classify all Hamiltonian stationary Lagrangian surfaces in complex Euclidean plane which are self-similar solutions of the mean curvature flow.

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

We construct minimal surfaces in hyperbolic and anti-de Sitter 3-space with the topology of a $n$-punctured sphere by loop group factorization methods. The end behavior of the surfaces is based on the asymptotics of Delaunay-type surfaces,…

Differential Geometry · Mathematics 2019-09-11 Alexander I. Bobenko , Sebastian Heller , Nicholas Schmitt
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