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Theorems · Theorem · general topology

Filter.TendstoCofinite.finite_preimage_singleton

∀ {α : Type u_1} {β : Type u_2} (f : α → β) [Filter.TendstoCofinite f] (b : β), (f ⁻¹' {b}).Finite
Defined in
Mathlib.Order.Filter.TendstoCofinite
Cited by
12 results in Mathlib
Foundations
Depth 69 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
Filter.TendstoCofinite

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Cited by13

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