The \(n\)-dimensional hyperbolic space \(\mathbb{H}^n\) is the unique (up to isometry) simply connected, complete Riemannian manifold of constant sectional curvature \(K = -1\).
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\vdots & \vdots & \vdots & \ddots &\vdots \\，更多细节参见电影
It’s always good if every discussion doesn’t turn into a flame war.，这一点在电影中也有详细论述
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