Theorems · Theorem · general topology
Metric.mem_closure_iff_infDist_zero
∀ {α : Type u} [inst : PseudoMetricSpace α] {s : Set α} {x : α}, s.Nonempty → (x ∈ closure s ↔ Metric.infDist x s = 0)A point belongs to the closure of s iff its infimum distance to this set vanishes.
- Cited by
- 5 results in Mathlib
- Foundations
- Depth 152 from the axioms · uses propext, Classical.choice, Quot.sound
- Assumes
- PseudoMetricSpace
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites8
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
- Realstatement · cited by 25,697
- Set.Nonemptystatement and proof · cited by 2,627
- PseudoMetricSpacestatement and proof · cited by 1,550
- closurestatement · cited by 1,254
- Metric.infEDistproof · cited by 147
- Metric.infDiststatement · cited by 68
- Metric.infEDist_ne_topproof · cited by 8
Cited by5
Results whose statement or proof uses this declaration.
- QuotientAddGroup.norm_mk_eq_zero_iff_mem_closureproof · cited by 3
- IsClosed.mem_iff_infDist_zeroproof · cited by 3
- QuotientGroup.norm_mk_eq_zero_iff_mem_closureproof · cited by 1
- Metric.infDist_pos_iff_notMem_closureproof · cited by 0
- Metric.continuousAt_inv_infDist_ptproof · cited by 0