Theorem LE.le.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) …
Added LE.le.ssubset_of_mem_notMemView on Github →