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[Merged by Bors] - chore: use notation3 for Ordinal.typeLT #39798

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[Merged by Bors] - chore: use notation3 for Ordinal.typeLT #39798

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vihdzp May 25, 2026
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guardmsgs
vihdzp May 25, 2026
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6 changes: 5 additions & 1 deletion Mathlib/SetTheory/Ordinal/Basic.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,11 @@ def type (r : α → α → Prop) [wo : IsWellOrder α r] : Ordinal :=
⟦⟨α, r, wo⟩⟧

/-- `typeLT α` is an abbreviation for the order type of the `<` relation of `α`. -/
scoped notation "typeLT " α:70 => @Ordinal.type α (· < ·) inferInstance
scoped notation3 "typeLT " α:70 => @Ordinal.type α (· < ·) inferInstance

/-- info: typeLT ℕ : Ordinal.{0} -/
#guard_msgs in
#check typeLT ℕ

instance zero : Zero Ordinal :=
⟨type <| @emptyRelation PEmpty⟩
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