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Theorems · Theorem · general topology

Filter.HasBasis.mem_of_mem

∀ {α : Type u_1} {ι : Sort u_4} {l : Filter α} {p : ι → Prop} {s : ι → Set α} {i : ι}, l.HasBasis p s → p i → s i ∈ l
Defined in
Mathlib.Order.Filter.Bases.Basic
Cited by
63 results in Mathlib
Foundations
Depth 9 from the axioms · uses no axioms

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