# Commit 2020-06-10 00:06 f1df14c2

View on Github →feat(group_theory/subgroup): normal_closure and gpowers (#2959)
Transfer some more proofs from `deprecated/subgroup`

Mathlib v3 is deprecated. Go to Mathlib v4

feat(group_theory/subgroup): normal_closure and gpowers (#2959)
Transfer some more proofs from `deprecated/subgroup`