case root => cases m₃; exact root
α : Type
inst✝² : Reactor α
rtr rtr₁ : α
β γ : Type
inst✝¹ : Reactor β
inst✝ : Reactor γ
rtr₂ : β
rtr₃ : γ
m₂ : Member Component.rtr ⊤ rtr₂
m₃ : Member Component.rtr ⊤ rtr₃
e₂ : m₂ ∼ m₃
e₁ : Member.root ∼ m₂
⊢ Member.root ∼ m₃
no goals