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comment What restricts the number of cohomologies?
@Akhil: Thanks a lot!
Jan
6
comment What restricts the number of cohomologies?
I'm guessing that the blue book is Stable homotopy theory? Thanks anyway!
Jan
6
comment What restricts the number of cohomologies?
This is a bit off-topic, but if I want to understand more about these stuff (motivation for spectrum, Poincare duality etc), where should I look?
Jan
5
comment Basic example of extensions of residue fields.
Consider a function field galois extension such that a prime is totally ramified, then complete with respect to that prime.