Theorem: Set.mapsTo_empty_iff (Matroid/ForMathlib/Function.lean)

State before:
α : Type u_1
β : Type u_2
r s✝ s₁ s₂ : Set α
t t' t₁ t₂ : Set β
f✝ f : α → β
s : Set α
⊢ MapsTo f s ∅ ↔ s = ∅
Tactic:
simp [mapsTo', subset_empty_iff]
State after:
no goals