Theorem ssubset_of_subset_not_subset

Modification history

2026-07-06 15:50
Mathlib/Order/RelClasses.lean
feat: use `LE.le` for subset relation in `Set`, `Finset`, `PSet`, `ZFSet`, `Class` (#32983) …
Deleted ssubset_of_subset_not_subsetView on Github →
2022-11-18 03:37
Mathlib/Order/RelClasses.lean
feat: port Order.RelClasses (#560) …
Added ssubset_of_subset_not_subsetView on Github →