Theorem: conjugate_one (LeanCourse/Lectures/Lecture9.lean)

State before:
G : Type u_1
H✝ : Type u_2
K : Type u_3
inst✝² : Group G
inst✝¹ : Group H✝
inst✝ : Group K
H : Subgroup G
⊢ conjugate 1 H = H
Tactic:
sorry
State after:
no goals