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arXiv 2005.05016math.DG
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欧氏超曲面的共形无穷小变分

Conformal infinitesimal variations of Euclidean hypersurfaces

M. Dajczer, M. I. Jimenez, Th. Vlachos

摘要:

在共形几何中,我们给出了允许非平凡共形无穷小变分的欧氏超曲面的分类。在保角变分的限制情况下,E. 1917年的卡尔丹。无穷小等距变分的情况是由U。1908年的Sbrana。特别是,我们表明,类的超曲面,允许共形无穷小的变化是远远大于一个考虑的嘉当。

英文摘要:

In the realm of conformal geometry, we give a classification of the Euclidean hypersurfaces that admit a non-trivial conformal infinitesimal variation. In the restricted case of conformal variations, such a classification was obtained by E. Cartan in 1917. The case of infinitesimal isometric variations was done by U. Sbrana in 1908. In particular, we show that the class of hypersurfaces that allow a conformal infinitesimal variation is much larger than the one considered by Cartan.

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