Pseudo-Einstein real hypersurfaces in complex hyperbolic two-plane Grassmannians

Pseudo-Einstein real hypersurfaces in complex hyperbolic two-plane Grassmannians
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DOI:
10.1016/j.aam.2016.02.001
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发表时间:
2016-05
期刊:
Adv. Appl. Math.
影响因子:
--
通讯作者:
Y. Suh
Y. Suh
中科院分区:
其他
文献类型:
--
作者:
Y. Suh

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本文首先从高斯方程出发,给出了复双曲两平面Grassmannians SU 2,m/S(U2⋅Um),m≥2中实超曲面M的曲率张量的完整表达式。其次,我们导出了SU~2,m/S(U~2⋅U~m)中M的Ricci张量的一个新公式。作为这一结果的一个应用,我们证明了在SU 2,m/S(U 2⊥Um)中不存在爱因斯坦Hopf或q⋅不变的爱因斯坦实超曲面。
In this paper we first introduce the full expression of the curvature tensor of a real hypersurface M in complex hyperbolic two-plane Grassmannians SU 2, m/S (U 2⋅ U m), m≥ 2 from the equations of Gauss. Next we derive a new formula for the Ricci tensor of M in SU 2, m/S (U 2⋅ U m). As an application of this result we prove that there do not exist Einstein Hopf or Q⊥-invariant Einstein real hypersurfaces in SU 2, m/S (U 2⋅ U m).