Theorem eq_of_subset_of_not_ssubset

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 eq_of_subset_of_not_ssubsetView on Github →
2026-01-07 07:34
Mathlib/Order/RelClasses.lean
chore(Order/Defs/Unbundled): deprecate `IsAntisymm` in favor of core's `Std.Antisymm` (#33685)
Modified eq_of_subset_of_not_ssubsetView on Github →
2023-12-09 13:26
Mathlib/Order/RelClasses.lean
feat: Finsets and multisets are graded (#8892) …
Added eq_of_subset_of_not_ssubsetView on Github →