Mathlib v3 is deprecated. Go to Mathlib v4

Theorem to_prev'_zero

Modification history

2021-05-17 12:38
src/algebra/homology/homotopy.lean
refactor(algebra/homology/homotopy): avoid needing has_zero_object (#7621) …
Deleted to_prev'_zeroView on Github →
2021-05-15 08:16
src/algebra/homology/homotopy.lean
feat(algebra/homology): homotopies between chain maps (#7483)
Added to_prev'_zeroView on Github →