Ultrafilter.ofComapInfPrincipal

{α : Type u} → {β : Type v} → {m : α → β} → {s : Set α} → {g : Ultrafilter β} → m '' s ∈ g → Ultrafilter α

Ultrafilter extending the inf of a comapped ultrafilter and a principal ultrafilter.

Defined in: Mathlib.Order.Filter.Ultrafilter.Defs
Cited by: 2 results in Mathlib
Foundations: Depth 75 from the axioms · uses propext, Classical.choice, Quot.sound

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