simp [Acyclic]
α : Type
inst✝ : Hierarchical α
rtr✝ rtr₁ rtr : α
⊢ ¬Acyclic rtr ↔ ¬∀ i ∈ rtr[Component.rcn], ¬i <[rtr] i
α : Type
inst✝ : Hierarchical α
rtr✝ rtr₁ rtr : α
⊢ (∃ x, x <[rtr] x) ↔ ∃ x ∈ rtr[Component.rcn], x <[rtr] x