2025-10-29 00:03
Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean
feat(AlgebraicTopology/SimplicialSet): pairings of non degenerate simplices, following Sean Moss (#28332) …
Added SSet.S.IsUniquelyCodimOneFace.δ_eq_iff