Theorem HasSubset.Subset.ssubset_of_mem_notMem

Modification history

2026-07-06 15:50

Mathlib/Data/Set/Insert.lean

feat: use `LE.le` for subset relation in `Set`, `Finset`, `PSet`, `ZFSet`, `Class` (#32983) …

Deleted HasSubset.Subset.ssubset_of_mem_notMem View on Github →

2025-05-25 12:30

Mathlib/Data/Set/Insert.lean

chore(*): not_mem/nmem -> notMem (#25159)

Added HasSubset.Subset.ssubset_of_mem_notMem View on Github →