On Hypersurfaces of ${\mathbb{H}}^2\times {\mathbb{H}}^2$

Dong Gao, Hui Ma, Zeke Yao

In this paper, we study hypersurfaces in ${\mathbb{H}}^2\times {\mathbb{H}}^2$. We first classify the hypersurfaces with constant principal curvatures and constant product angle functio…