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Results tagged with gr.group-theory
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user 7621
Questions about the branch of algebra that deals with groups.
11
votes
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answers
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Closed 3-manifolds with free abelian fundamental groups
Which free abelian groups can be realized as the fundamental group of a closed 3-manifold? The only one I can come up with is $\mathbb{Z}$, which is the fundamental group of $S^1 \times S^2$. For th …
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