Theorems · Theorem · general topology
isPreconnected_of_forall_pair
∀ {α : Type u} [inst : TopologicalSpace α] {s : Set α},
(∀ x ∈ s, ∀ y ∈ s, ∃ t ⊆ s, x ∈ t ∧ y ∈ t ∧ IsPreconnected t) → IsPreconnected sIf any two points of a set are contained in a preconnected subset, then the original set is preconnected as well.
- Defined in
- Mathlib.Topology.Connected.Basic
- Cited by
- 3 results in Mathlib
- Foundations
- Depth 61 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.Nonemptyproof · cited by 2,627
- Set.eq_empty_or_nonemptyproof · cited by 248
- IsPreconnectedstatement and proof · cited by 205
- isPreconnected_emptyproof · cited by 14
- isPreconnected_of_forallproof · cited by 3
Cited by3
Results whose statement or proof uses this declaration.
- Set.OrdConnected.isPreconnectedproof · cited by 9
- IsPreconnected.biUnion_of_reflTransGenproof · cited by 3
- IsPreconnected.prodproof · cited by 3