Set.prod_surjOn_fst_iff

∀ {β₁ : Type u_8} {β₂ : Type u_9} {t₁ : Set β₁} {t₂ : Set β₂}, Set.SurjOn Prod.fst (t₁ ×ˢ t₂) t₁ ↔ t₁ = ∅ ∨ t₂.Nonempty

Defined in: Mathlib.Data.Set.Function
Cited by: 0 results in Mathlib
Foundations: Depth 28 from the axioms · uses propext, Classical.choice, Quot.sound

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