herbrand quotient

The Herbrand quotient: a ratio of cardinalities of two Tate cohomology groups. Key in proof of Artin reciprocity.

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Galois cohomology

- Tags: - #todo/untagged - Refs: - https://wstein.org/edu/2010/582e/refs/tate-galois_cohomology.pdf - Links: - Hilbert 90 - Brauer group - Tate-Shafarevich group - Unsorted/herbrand quotient