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Theorems · Theorem · order theory

Set.notMem_diff_of_mem

Deprecated since 2026-06-03Use Set.notMem_sdiff_of_mem instead.

∀ {α : Type u_1} {s t : Set α} {x : α}, x ∈ t → x ∉ s \ t

Alias of Set.notMem_sdiff_of_mem.

Defined in
Mathlib.Order.BooleanAlgebra.Set
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Foundations
Depth 7 from the axioms · uses no axioms

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