Subgroups of free groups are free.Suggest a slogan
(Nielsen--Schreier)
Let \(F\) be a free group and let \(H \leq F\) be a subgroup. Then \(H\) is free.
[@Hat02].
Every subgroup of a free group is free
C-ILVEB
C-ILVEB
(Nielsen--Schreier)
Let \(F\) be a free group and let \(H \leq F\) be a subgroup. Then \(H\) is free.
[@Hat02].