Set.Nontrivial.not_subset_singleton

∀ {α : Type u} {s : Set α} {x : α}, s.Nontrivial → ¬s ⊆ {x}

Defined in: Mathlib.Data.Set.Subsingleton
Cited by: 5 results in Mathlib
Foundations: Depth 29 from the axioms · uses propext, Classical.choice, Quot.sound

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