Semicontinuous.isOpen

∀ {α : Type u_1} {β : Type u_2} [inst : TopologicalSpace α] {r : α → β → Prop},
  Semicontinuous r → ∀ (b : β), IsOpen {x | r x b}

Defined in: Mathlib.Topology.Semicontinuity.Defs
Cited by: 4 results in Mathlib
Foundations: Depth 69 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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