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Theorems · Theorem · logic and foundations

Ordinal.blsub_lt_ord_lift

Deprecated since 2026-03-22Use Ordinal.lift_iSup_add_one_lt_of_lt_cof instead.

∀ {o : Ordinal.{u}} {f : (a : Ordinal.{u}) → a < o → Ordinal.{max u v}} {c : Ordinal.{max u v}},
  Cardinal.lift.{v, u} o.card < c.cof → (∀ (i : Ordinal.{u}) (hi : i < o), f i hi < c) → o.blsub f < c
Defined in
Mathlib.SetTheory.Cardinal.Cofinality.Ordinal
Cited by
3 results in Mathlib
Foundations
Depth 93 from the axioms · uses propext, Classical.choice, Quot.sound

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