Theorem Ordinal.principal_iff_of_monotone

Modification history

2026-03-20 09:45

Mathlib/SetTheory/Ordinal/Principal.lean

chore: rename `Ordinal.Principal` → `Ordinal.IsPrincipal` (#36793) …

Deleted Ordinal.principal_iff_of_monotone View on Github →

2024-11-12 10:47

Mathlib/SetTheory/Ordinal/Principal.lean

chore(SetTheory/Ordinal/Principal): use `variable` (#18898) …

Modified Ordinal.principal_iff_of_monotone View on Github →

2024-10-16 11:05

Mathlib/SetTheory/Ordinal/Principal.lean

feat(SetTheory/Ordinal/Principal): simpler characterization of `Principal` for monotone operations (#17742) …

Added Ordinal.principal_iff_of_monotone View on Github →