Topic

Poincaré conjecture.

theorem in geometric topology that every simply connected, closed 3-manifold is homeomorphic to the 3-sphere

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In the mathematical field of geometric topology, the Poincaré conjecture is a theorem about the characterization of the 3-sphere.

Poincaré conjecture — theorem in geometric topology that every simply connected, closed 3-manifold is homeomorphic to the 3-sphere