Real hypersurfaces in complex two-plane Grassmannians with parallel Ricci tensor

Real hypersurfaces in complex two-plane Grassmannians with parallel Ricci tensor
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具有平行里奇张量的复杂两平面格拉斯曼方程中的实超曲面

DOI:
10.1017/s0308210510001472
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发表时间:
2012
期刊:
Proceedings of the Royal Society of Edinburgh: Section A Mathematics
影响因子:
--
通讯作者:
Y. Suh
Y. Suh
中科院分区:
--
文献类型:
--
作者:
Y. Suh

文献摘要

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本文从高斯方程出发,给出了复二平面Grassmannian G ~ 2(m+2)中真实的超曲面M的曲率张量的完整表达式.然后,我们得到了一个新的公式M的Ricci张量在G2(m+2)。最后,我们证明了具有平行Ricci张量的复两平面Grassmannian G2(m+2)中不存在任何Hopf真实的超曲面。
We introduce the full expression of the curvature tensor of a real hypersurface M in complex two-plane Grassmannians G2(ℂm+2) from the Gauss equation. We then derive a new formula for the Ricci tensor of M in G2(ℂm+2). Finally, we prove that there does not exist any Hopf real hypersurface in complex two-plane Grassmannians G2(ℂm+2) with parallel Ricci tensor.