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Strongly Einstein real hypersurfaces in $${\mathbb {C}}P^2$$ and $${\mathbb {C}}H^2$$
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas ( IF 2.9 ) Pub Date : 2023-12-14 , DOI: 10.1007/s13398-023-01529-0
Yaning Wang , Yingdong Zhang

In this paper, we prove that a real hypersurface in \({\mathbb {C}}P^2(c)\) and \({\mathbb {C}}H^2(c)\) is strongly Einstein if and only if it is locally congruent to a geodesic sphere with radius \(d=2\ln (\sqrt{2}+1)/\sqrt{-c}\) in \({\mathbb {C}}H^2(c)\). This improves a resent paper by the present authors Wang and Zhang (Weakly Einstein real hypersurfaces in \({\mathbb {C}}P^2\) and \({\mathbb {C}}H^2\), J Geom Phys 181:104648, 2022).



中文翻译:


$${\mathbb {C}}P^2$$ 和 $${\mathbb {C}}H^2$$ 中的强爱因斯坦实超曲面



在本文中,我们证明 \({\mathbb {C}}P^2(c)\) 和 \({\mathbb {C}}H^2(c)\) 中的实超曲面是强爱因斯坦的,如果并且仅当它与 \({\mathbb {C}}H^ 中的半径为 \(d=2\ln (\sqrt{2}+1)/\sqrt{-c}\) 的测地球体局部一致时2(c)\)。这改进了当前作者 Wang 和 Zhang 的最新论文(\({\mathbb {C}}P^2\) 和 \({\mathbb {C}}H^2\) 中的弱爱因斯坦实超曲面,J Geom物理学 181:104648, 2022)。

更新日期:2023-12-15
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