Theorem subset_iff_ssubset_or_eq

Modification history

2026-01-09 08:53
Mathlib/Order/RelClasses.lean
chore(Order/Defs/Unbundled): deprecate `IsRefl` in favor of core's `Std.Refl` (#33755)
Modified subset_iff_ssubset_or_eqView 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 subset_iff_ssubset_or_eqView on Github →
2022-11-18 03:37
Mathlib/Order/RelClasses.lean
feat: port Order.RelClasses (#560) …
Added subset_iff_ssubset_or_eqView on Github →