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Results tagged with 3-manifolds
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user 167503
A three-manifold is a space that locally looks like Euclidean three-dimensional space
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Universal covers of non-prime 3-manifolds
Let $M$ be a closed, connected, oriented 3-manifold. If $M$ is prime, then we know what the universal cover of $M$ looks like: it is either $S^3, \mathbb{R}^3$ or $S^2 \times \mathbb{R}$ depending on …
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