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arXiv 0812.2348math-phmath.MP
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与4-对称空间相关的二阶椭圆可积系统的一些例子

Some examples of `second order elliptic integrable systems associated to a 4-symmetric space'

Frédéric Hélein

摘要:

本文阐述了Idrisse Khemar最近关于构造各种几何完全可积系统的结果,推广了F. Hélein and P. Romon.我们首先解释说,在4维欧氏空间的表面,HSLS是一个特殊的情况下,更一般的理论,表面调和左高斯映射,这个理论也包括经典的常平均曲率曲面在3-空间。然后,我们阐述了这一理论的推广,在8维欧氏空间的表面,使用八元数。最后,我们讨论超对称调和映射和本原映射,这一理论也涵盖了HSLS情形。

英文摘要:

In this text we expound recent results by Idrisse Khemar on the construction of various geometric completely integrable systems generalizing the structure of Hamiltonian stationary Lagrangian surfaces (HSLS) discovered by F. Hélein and P. Romon. We first explain that, for surfaces in a 4-dimensional Euclidean space, the HSLS are a particular case of a more general theory of surfaces with harmonic left Gauss map and that this theory includes also the classical constant mean curvature surfaces in 3-space. Then we expound a generalization of this theory for surfaces in an 8-dimensional Euclidean space, using octonions. Lastly we discuss supersymmetric harmonic and primitive maps, a theory which also covers the HSLS cas.

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