Project-declaredLean 4.33.0-rc1
Dvd card class Group of unramified is Cyclic
dvd_card_classGroup_of_unramified_isCyclic
Plain-language statement
This is the second part of Hilbert Theorem 94, which states that if L/K is an unramified cyclic finite extension of number fields of odd prime degree, then the degree divides the class number of K.
number theorycyclotomic fieldsFermat's Last Theorem
Source project: FLT for regular primes
Person-level attribution pending.