Theorem IsLowerSet.sdiff_of_isUpperSet

Modification history

2026-01-25 18:29
Mathlib/Order/UpperLower/Basic.lean
feat(Order/UpperLower/Basic): use `to_dual` - part 1 (#33950)
Deleted IsLowerSet.sdiff_of_isUpperSetView on Github →
2023-10-21 10:50
Mathlib/Order/UpperLower/Basic.lean
feat: Removing elements from a lower set (#7374) …
Added IsLowerSet.sdiff_of_isUpperSetView on Github →