Theorem Ordinal.principal_zero

Modification history

2026-03-20 09:45
Mathlib/SetTheory/Ordinal/Principal.lean
chore: rename `Ordinal.Principal` → `Ordinal.IsPrincipal` (#36793) …
Deleted Ordinal.principal_zeroView on Github →
2025-11-24 09:57
Mathlib/SetTheory/Ordinal/Principal.lean
chore: golf proofs that use `0 < x ↔ x ≠ 0` (#31895) …
Modified Ordinal.principal_zeroView on Github →
2024-08-19 07:42
Mathlib/SetTheory/Ordinal/Principal.lean
chore(SetTheory/Ordinal/Principal): clean up formatting (#15953) …
Modified Ordinal.principal_zeroView on Github →
2023-02-22 19:59
Mathlib/SetTheory/Ordinal/Principal.lean
feat: port SetTheory.Ordinal.Principal (#2442)
Added Ordinal.principal_zeroView on Github →