Theorem Sum.getLeft?_eq_none_iff

Modification history

2023-09-12 23:50
Mathlib/Data/Sum/Basic.lean
chore: bump Std for #251 (#7126) …
Deleted Sum.getLeft?_eq_none_iffView on Github →
2023-08-18 21:51
Mathlib/Data/Sum/Basic.lean
fix(Data/Sum/Basic): Add ? to Sum-get function names. (#6665) …
Added Sum.getLeft?_eq_none_iffView on Github →