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For questions requesting examples of a certain structure or phenomenon
7
votes
Examples of theorems with proofs that have dramatically improved over time
The first proof of the Hopf invariant one theorem due to Adams is very technical. It involves decomposing $sq^{2^n}$ as a composite of secondary cohomology operations when $n\geq 4$. Then Atiyah and A …
15
votes
1
answer
1k
views
Comodule exercises desired
I am curious if anyone knows of some lecture notes, a text or fun little toy examples that i could work on. … So if you have:
1. the name of a text that has lots of examples that it works through, essentially something that tries to correct for Moore's first point, or
2. a list of examples to work through, like …