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Jun 27, 2023 at 15:28 comment added Sean Tilson They are a machine for doing computations with a couple of fundamental steps. So you want to compute F(X), you first break down/approximate X by things where you can compute F (or something like it). You then turn a crank which is incredibly non0trivial (compute differentials etc). Finaly, you reassemble the pieces into what you want (also highly nontrivial). Perhaps this is all obvious though.
Jun 30, 2022 at 8:35 comment added David White What's the watered down example of spectral sequences?
Nov 25, 2010 at 0:12 history answered Sean Tilson CC BY-SA 2.5