Theorem: conjugate_one (MIL/C08_Groups_and_Rings/S01_Groups.lean)

State before:
G : Type u_1
inst✝ : Group G
H : Subgroup G
⊢ conjugate 1 H = H
Tactic:
ext x
State after:
case h
G : Type u_1
inst✝ : Group G
H : Subgroup G
x : G
⊢ x ∈ conjugate 1 H ↔ x ∈ H

State before:
case h
G : Type u_1
inst✝ : Group G
H : Subgroup G
x : G
⊢ x ∈ conjugate 1 H ↔ x ∈ H
Tactic:
simp [conjugate]
State after:
no goals