Theorem Ordinal.principal_add_iff_zero_or_omega0_opow

Modification history

2026-03-20 09:45
Mathlib/SetTheory/Ordinal/Principal.lean
chore: rename `Ordinal.Principal` → `Ordinal.IsPrincipal` (#36793) …
Deleted Ordinal.principal_add_iff_zero_or_omega0_opowView on Github →
2024-11-12 10:47
Mathlib/SetTheory/Ordinal/Principal.lean
chore(SetTheory/Ordinal/Principal): use `variable` (#18898) …
Modified Ordinal.principal_add_iff_zero_or_omega0_opowView on Github →
2024-10-03 10:05
Mathlib/SetTheory/Ordinal/Principal.lean
refactor(SetTheory/Ordinal/Basic): deprecate Ordinal.omega in favor of Ordinal.omega0 (#17158) …
Added Ordinal.principal_add_iff_zero_or_omega0_opowView on Github →