A characterization of Weingarten surfaces in hyperbolic 3-space

Details A characterization of Weingarten surfaces in hyperbolic 3-space A characterization of Weingarten surfaces in hyperbolic 3-space

2007-09-15

arxiv.org/abs/0709.2441v2

Mathematics

Differential Geometry

20 pages AMS-LATEX, version 2 correction of typos, inclusion of non-graph cases

Scientific paper

We study 2-dimensional submanifolds of the space ${\mathbb{L}}({\mathbb{H}}^3)$ of oriented geodesics of hyperbolic 3-space, endowed with the canonical neutral K\"ahler structure. Such a surface is Lagrangian iff there exists a surface in ${\mathbb{H}}^3$ orthogonal to the geodesics of $\Sigma$. We prove that the induced metric on a Lagrangian surface in ${\mathbb{L}}({\mathbb{H}}^3)$ has zero Gauss curvature iff the orthogonal surfaces in ${\mathbb{H}}^3$ are Weingarten: the eigenvalues of the second fundamental form are functionally related. We then classify the totally null surfaces in ${\mathbb{L}}({\mathbb{H}}^3)$ and recover the well-known holomorphic constructions of flat and CMC 1 surfaces in ${\mathbb{H}}^3$.

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