Finset.mem_image

∀ {α : Type u_1} {β : Type u_2} [inst : DecidableEq β] {f : α → β} {s : Finset α} {b : β},
  b ∈ Finset.image f s ↔ ∃ a ∈ s, f a = b

Defined in: Mathlib.Data.Finset.Image
Cited by: 105 results in Mathlib
Foundations: Depth 74 from the axioms, rests on 1,371 definitions · uses propext, Classical.choice, Quot.sound
Assumes: DecidableEq

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