Poincaré Conjecture

In mathematics, the Poincaré Conjecture is a theorem about the characterization of the 3-sphere, which is the hypersphere that bounds the unit ball in four-dimensional space. The conjecture states that every simply connected, closed 3-manifold is homeomorphic to the 3-sphere.

Behold, the beautiful Poincaré Fish.

Poincare_fish

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