Moise's theorem
Introduction In geometric topology, a branch of mathematics, '''Moise's theorem''', proved by Edwin E. Moise in , states that any topological 3-manifold has an essentially unique piecewise-linear structure and smooth structure.The analogue of Moise's theorem in dimension 4 (and above) is false: there are topological 4-manifolds with no piecewise linear structures, and others with an infinite number of inequivalent ones.
See also * Exotic sphere
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