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Questions about the branch of algebra that deals with groups.

4 votes

homotopy invariant and coinvariant

I have a different way to approach to this sort of question which appears in the paper: Klein, John R. The dualizing spectrum of a topological group. Math. Ann. 319 (2001), no. 3, 421–456 The above …
John Klein's user avatar
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10 votes

Proofs of the Stallings-Swan theorem

This is really a comment rather than an answer, but perhaps the answer to your question follows from doing a mathscinet search? I did one and I found the following reference: Dunwoody, M. J. Accessi …
John Klein's user avatar
  • 18.5k