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Aug 23, 2023 at 7:25 vote accept David Roberts
Aug 23, 2023 at 7:21 history edited David Roberts CC BY-SA 4.0
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Jun 3, 2012 at 21:28 comment added David Roberts Thanks, Peter, I'll check that out. Perhaps I should have mentioned that MacLane gave a contracting homotopy of the chain complex (non-normalised) associated to W of a simplicial ring in his original lecture on W and Wbar.
Jun 3, 2012 at 19:47 history answered Peter May CC BY-SA 3.0