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Jan 25, 2020 at 6:44 history edited domenico fiorenza
(added homological-algebra tag)
Jan 24, 2020 at 20:24 history edited domenico fiorenza CC BY-SA 4.0
(a couple of occurencies of "quasi-isomorphism" corrected to "homotopy equivalence"; the two notions are equivalent for a chain complex of vector spaces, but better to avoid confusion as they are generally distinct)
Jan 24, 2020 at 19:23 history asked domenico fiorenza CC BY-SA 4.0