arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1809.01933math.CV
收藏

Grassmannian闭SU(l,m)-轨道间的全纯映射

Holomorphic maps between closed SU(l,m)-orbits in Grassmannian

Sung-Yeon Kim

摘要:

格拉斯曼流形中的$SU(\ell, m)$的轨道具有齐次CR结构。本文研究了Grassmannian流形中将$SU(\ell,m)$的一个闭轨道发送到$SU(\ell',m')$的一个闭轨道的光滑CR映射的芽.我们证明了如果两个轨道的Levi形式的签名差不是太大,那么映射可以分解成一个简单的形式,并且其中一个因子扩展到环境格拉斯曼到另一个格拉斯曼关于标准度量的全测地线嵌入。作为应用,我们给出了Grassmannian流形中的光滑CR映射将$SU(\ell,m)$的闭轨道延伸到$SU(\ell',m')$的闭轨道的一个充分条件,作为Grassmannian流形到另一Grassmannian流形的全测地嵌入.

英文摘要:

Orbits of $SU(\ell, m)$ in a Grassmannian manifold have homogeneous CR structures. In this paper, we study germs of smooth CR mappings sending a closed orbit of $SU(\ell,m)$ into a closed orbit of $SU(\ell',m')$ in Grassmannian manifolds. We show that if the signature difference of the Levi forms of two orbits is not too large, then the mapping can be factored into a simple form and one of the factors extends to a totally geodesic embedding of the ambient Grassmannian into another Grassmannian with respect to the standard metric. As an application, we give a sufficient condition for a smooth CR mapping sending a closed orbit of $SU(\ell,m)$ into a closed orbit of $SU(\ell',m')$ in Grassmannian manifolds to extend as a totally geodesic embedding of the Grassmannian into another Grassmannian.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑