Theorem ne_of_ssuperset

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 ne_of_ssupersetView on Github →
2026-01-08 06:50
Mathlib/Order/RelClasses.lean
chore(Order/Defs/Unbundled): deprecate `IsIrrefl` in favor of core's `Std.Irrefl` (#33717)
Modified ne_of_ssupersetView on Github →
2023-01-11 08:02
Mathlib/Order/RelClasses.lean
feat: A set is either a subsingleton or nontrivial (#1047) …
Modified ne_of_ssupersetView on Github →
2022-11-18 03:37
Mathlib/Order/RelClasses.lean
feat: port Order.RelClasses (#560) …
Added ne_of_ssupersetView on Github →