The geometry of fractal sets
《The geometry of fractal sets》 · 第 26 页 · Chapter 3,Theorem 3.6(仅录三维等价判据)
A 3-manifold \(M\) is a homotopy 3-sphere if and only if \(M\) is closed, connected, and simply connected.
The geometry of fractal sets
《The geometry of fractal sets》 · 第 26 页 · Chapter 3,Theorem 3.6(仅录三维等价判据)
A 3-manifold \(M\) is a homotopy 3-sphere if and only if \(M\) is closed, connected, and simply connected.
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