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Space-like maximal surfaces and time-like minimal surfaces in Lorentz-Minkowski3-space are both characterized as zero mean curvature surfaces. We are interested in the case where the zero mean curvature surface changes type from space-like…

With several concrete examples of zero mean curvature surfaces in $\boldsymbol{R}^3_1$ containing a light-like line recently having been found, here we construct all real analytic germs of zero mean curvature surfaces by applying the…

Differential Geometry · Mathematics 2017-07-25 Masaaki Umehara , Kotaro Yamada

It is classically known that the only zero mean curvature entire graphs in the Euclidean 3-space are planes, by Bernstein's theorem. A surface in Lorentz-Minkowski 3-space $\boldsymbol{R}^3_1$ is called of mixed type if it changes causal…

Differential Geometry · Mathematics 2016-03-07 Shoichi Fujimori , Yu Kawakami , Masatoshi Kokubu , Wayne Rossman , Masaaki Umehara , Kotaro Yamada

A zero mean curvature surface in the Lorentz-Minkowski 3-space is said to be of Riemann-type if it is foliated by circles and at most countably many straight lines in parallel planes. We classify all zero mean curvature surfaces of…

Differential Geometry · Mathematics 2017-08-08 Shintaro Akamine

Riemann zero mean curvature examples in the Lorentz-Minkowski space are surfaces with zero mean curvature foliated by circles contained in parallel planes. In contrast to the Euclidean case, this family of surfaces presents new and rich…

Differential Geometry · Mathematics 2021-11-09 Seher Kaya , Rafael López

Calabi and Cheng-Yau's Bernstein-type theorem asserts that an entire zero mean curvature graph in Lorentz-Minkowski $(n+1)$-space $\boldsymbol R^{n+1}_1$ which admits only space-like points is a hyperplane. Recently, the third and fourth…

Differential Geometry · Mathematics 2019-07-23 Shintaro Akamine , Atsufumi Honda , Masaaki Umehara , Kotaro Yamada

Until now, the only known maximal surfaces in Minkowski 3-space of finite topology with compact singular set and without branch points were either genus zero or genus one, or came from a correspondence with minimal surfaces in Euclidean…

Differential Geometry · Mathematics 2010-02-13 Shoichi Fujimori , Wayne Rossman , Masaaki Umehara , Seong-Deog Yang , Kotaro Yamada

Calabi's Bernstein-type theorem asserts that a zero mean curvature entire graph in Lorentz-Minkowski space $\boldsymbol L^3$ which admits only space-like points is a space-like plane. Using the fluid mechanical duality between minimal…

Differential Geometry · Mathematics 2019-06-26 Shintaro Akamine , Masaaki Umehara , Kotaro Yamada

The geometry and topology of complete nonorientable maximal surfaces with lightlike singularities in the Lorentz-Minkowski 3-space are studied. Some topological congruence formulae for surfaces of this kind are obtained. As a consequence,…

Differential Geometry · Mathematics 2010-02-12 Shoichi Fujimori , Francisco J. Lopez

In this paper, we shall prove that space-like surfaces with bounded mean curvature functions in real analytic Lorentzian 3-manifolds can change their causality to time-like surfaces only if the mean curvature functions tend to zero.…

Differential Geometry · Mathematics 2015-08-12 Atsufumi Honda , Miyuki Koiso , Masatoshi Kokubu , Masaaki Umehara , Kotaro Yamada

We show that the singularities of spacelike maximal surfaces in Lorentz-Minkowski 3-space generically consist of cuspidal edges, swallowtails and cuspidal cross caps. The same result holds for spacelike mean curvature one surfaces in de…

Differential Geometry · Mathematics 2011-11-09 Shoichi Fujimori , Kentaro Saji , Masaaki Umehara , Kotaro Yamada

Minimal surfaces with planar curvature lines in the Euclidean space have been studied since the late 19th century. On the other hand, the classification of maximal surfaces with planar curvature lines in the Lorentz-Minkowski space has only…

Differential Geometry · Mathematics 2018-08-29 Joseph Cho , Yuta Ogata

Consider a surface $S$ immersed in the Lorentz-Minkowski 3-space $\boldsymbol R^3_1$. A complete light-like line in $\boldsymbol R^3_1$ is called an entire null line on the surface $S$ in $\boldsymbol R^3_1$ if it lies on $S$ and consists…

Differential Geometry · Mathematics 2019-07-02 Shintaro Akamine , Masaaki Umehara , Kotaro Yamada

Consider the Lorentz-Minkowski $3$-space $\mathbb{L}^3$ with the metric $dx^2+dy^2-dz^2$ in canonical coordinates $(x,y,z)$. A surface in $\mathbb{L}^3$ is said to be separable if satisfies an equation of the form $f(x)+g(y)+h(z)=0$ for…

Differential Geometry · Mathematics 2020-05-18 Seher Kaya , Rafael López

We shall investigate maximal surfaces in Minkowski 3-space with singularities. Although the plane is the only complete maximal surface without singular points, there are many other complete maximal surfaces with singularities and we show…

Differential Geometry · Mathematics 2007-05-23 Masaaki Umehara , Kotaro Yamada

A timelike minimal surface in Minkowski 3-space is a surface whose induced metric is Lorentzian and with vanishing mean curvature. Such surfaces have many kinds of singularities. In this paper, we prove existence and non-existence theorems…

Differential Geometry · Mathematics 2024-08-02 Shintaro Akamine

Using Konderak's representation formula, we construct an entire zero-mean curvature graph of mixed-type in Lorentz-Minkowski 3-space over a space-like plane, which does not belong to the class of "Kobayashi surfaces". We also point out the…

Differential Geometry · Mathematics 2025-05-29 Takeki Komatsu , Masaaki Umehara

We deal with solitons of the mean curvature flow. The definition of \textit{translating solitons on a light-like direction} in Minkowski 3-space is introduced. Firstly, we classify those which are graphical, \textit{translation surfaces},…

Differential Geometry · Mathematics 2021-07-20 Erdem Kocakuşaklı , Miguel Ortega

We introduce a class of zero mean curvature surfaces with singularities in the isotropic 3-space, called ZMC-faces. As a main result, we establish three Osserman-type inequalities for a ZMC-face under certain assumptions on both…

Differential Geometry · Mathematics 2026-04-27 Riku Kishida

We give a comprehensive account of zero mean curvature surfaces in isotropic 3-space with planar curvature lines. After giving a complete classification all such surfaces, we show that they belong to a 1-parameter family of surfaces. We…

Differential Geometry · Mathematics 2024-10-28 Joseph Cho , Masaya Hara
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