+The Poincaré Conjecture was a central question in [Topology](/wiki/topology), proposing that any simply connected, closed three-dimensional space is equivalent to a sphere. This profound idea, a quest for a century, was famously proven by Grigori Perelman, revealing a deep truth about the very nature of [Shape](/wiki/shape).
+## See also
+- [Manifold](/wiki/manifold)
+- [Perelman](/wiki/perelman)
+- [Millennium Problems](/wiki/millennium_problems)
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