case trans.time hi e => exact .trans e (hi $ e.preserves_trivial triv)
α : Type
inst✝ : Proper α
s s₁ s₂ s₁✝ s₂✝ s₃✝ : State α
a✝ : s₂✝ ⇓ s₃✝
hi : State.Trivial s₂✝ → Step.Time.RTC s₂✝ s₃✝
triv : State.Trivial s₁✝
e : s₁✝ ↓ₜ s₂✝
⊢ Step.Time.RTC s₁✝ s₃✝
no goals