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arXiv 0912.4972math.DG
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三维双曲空间中的离散平坦曲面和线性Weingarten曲面

Discrete flat surfaces and linear Weingarten surfaces in hyperbolic 3-space

Tim Hoffmann, Wayne Rossman, Takeshi Sasaki, Masaaki Yoshida

摘要:

从离散可积系统的角度定义了三维双曲空间中的离散平坦曲面,并证明了该定义的合理性。我们展示了这些表面如何对应于先前定义的离散常数中曲率1双曲3-空间表面,我们还描述了离散焦面(离散焦散),可用于定义离散平面上的奇点。我们还研究了离散线性Weingarten表面的Bryant型双曲3-空间,并考虑一个例子的离散平面相关的Airy方程,表现出燕尾奇点和斯托克斯现象。

英文摘要:

We define discrete flat surfaces in hyperbolic 3-space from the perspective of discrete integrable systems and prove properties that justify the definition. We show how these surfaces correspond to previously defined discrete constant mean curvature 1 surfaces in hyperbolic 3-space, and we also describe discrete focal surfaces (discrete caustics) that can be used to define singularities on discrete flat surfaces. We also examine discrete linear Weingarten surfaces of Bryant type in hyperbolic 3-space, and consider an example of a discrete flat surface related to the Airy equation that exhibits swallowtail singularities and a Stokes phenomenon.

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