Project-declaredLean 4.33.0-rc1
Trivial Tate Cohomology of cases
Rep.TrivialTateCohomology.of_cases
Plain-language statement
To check that a finite group has trivial Tate cohomology, it's enough to show it has trivial cohomology and trivial homology, and that the 0-th and -1st Tate cohomology groups are trivial.
number theoryclass field theorylocal fields
Source project: Class Field Theory
Person-level attribution pending.