no goals
α : Type ?u.310682
β : Type ?u.310685
γ : Type ?u.310688
r : α → α → Prop
s : β → β → Prop
t : γ → γ → Prop
o : Ordinal
f : (a : Ordinal) → a < o → Ordinal
a : Ordinal
⊢ a < bsup o f ↔ ∃ i hi, a < f i hi
simpa only [not_forall, not_le] using not_congr (@bsup_le_iff.{_, v} _ f a)