feat: port GroupTheory.Subgroup.Basic (#1797)

Co-authored-by: Johan Commelin <johan@commelin.net> Co-authored-by: Lukas Miaskiwskyi <lukas.mias@gmail.com> Co-authored-by: qawbecrdtey <qawbecrdtey@naver.com> Co-authored-by: Vierkantor <vierkantor@vierkantor.com> Co-authored-by: Floris van Doorn <fpvdoorn@gmail.com>
leanprover-community · Jan 26, 2023 · 746cf5a · 746cf5a
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diff --git a/Mathlib.lean b/Mathlib.lean
@@ -553,6 +553,7 @@ import Mathlib.GroupTheory.GroupAction.Units
 import Mathlib.GroupTheory.Perm.Basic
 import Mathlib.GroupTheory.Perm.Support
 import Mathlib.GroupTheory.Perm.ViaEmbedding
+import Mathlib.GroupTheory.Subgroup.Basic
 import Mathlib.GroupTheory.Submonoid.Basic
 import Mathlib.GroupTheory.Submonoid.Center
 import Mathlib.GroupTheory.Submonoid.Centralizer