Theorems · Definition · general topology
Ultrafilter.extend
{α : Type u} → {γ : Type u_1} → [TopologicalSpace γ] → (α → γ) → Ultrafilter α → γThe extension of a function α → γ to a function Ultrafilter α → γ.
When γ is a compact Hausdorff space it will be continuous.
- Cited by
- 6 results in Mathlib
- Foundations
- Depth 80 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.
Cites4
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- TopologicalSpacestatement and proof · cited by 24,529
- Ultrafilterstatement · cited by 193
- IsDenseInducing.extendproof · cited by 29
- isDenseInducing_pureproof · cited by 4
Cited by9
Results whose statement or proof uses this declaration.
- ultrafilter_extend_extendsstatement · cited by 4
- preStoneCechExtendproof · cited by 3
- continuous_ultrafilter_extendstatement · cited by 2
- preStoneCechCompatstatement and proof · cited by 1
- ultrafilter_extend_eq_iffstatement and proof · cited by 1
- Profinite.projectivePresentationproof · cited by 0
- ultrafilter_extend_purestatement · cited by 0
- eq_if_preStoneCechUnit_eqproof · cited by 0
- CompHaus.projectivePresentationproof · cited by 0