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Results tagged with gr.group-theory
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user 32022
Questions about the branch of algebra that deals with groups.
13
votes
Is the Hurewicz theorem ever used to compute abelianizations?
The mapping class group of a smooth manifold $M$ is the group of all its self diffeomorphisms up to isotopy, i.e. $\pi_0(\operatorname{Diff}(M))\cong \pi_1(B\operatorname{Diff}(M))$.
A large portion …
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