Theorems · Theorem · general topology
DenseRange.exists_mem_open
∀ {X : Type u_1} [inst : TopologicalSpace X] {α : Type u_4} {f : α → X} {s : Set X},
DenseRange f → IsOpen s → s.Nonempty → ∃ a, f a ∈ s- Defined in
- Mathlib.Topology.Continuous
- Cited by
- 6 results in Mathlib
- Foundations
- Depth 66 from the axioms · uses propext, Classical.choice, Quot.sound
- Assumes
- TopologicalSpace
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites7
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- Setstatement and proof · cited by 53,352
- TopologicalSpacestatement and proof · cited by 24,529
- Set.Nonemptystatement and proof · cited by 2,627
- IsOpenstatement and proof · cited by 2,400
- DenseRangestatement and proof · cited by 164
- Set.exists_range_iffproof · cited by 22
- Dense.exists_mem_openproof · cited by 10
Cited by6
Results whose statement or proof uses this declaration.
- IsOpen.exists_vadd_memproof · cited by 3
- IsOpen.exists_smul_memproof · cited by 3
- DenseRange.mem_nhdsproof · cited by 3
- denseRange_zpow_iff_surjectiveproof · cited by 1
- denseRange_zsmul_iff_surjectiveproof · cited by 1
- exists_closed_cover_approximatesLinearOn_of_hasFDerivWithinAtproof · cited by 1