isOpen_singleton_nhdsAdjoint

∀ {α : Type u_1} {a b : α} (f : Filter α), b ≠ a → IsOpen {b}

Defined in: Mathlib.Topology.Order
Cited by: 1 results in Mathlib
Foundations: Depth 63 from the axioms · uses propext, Classical.choice, Quot.sound

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