Theorem: Matroid.emptyOn_flat_iff (Matroid/Flat.lean)

State before:
α : Type u_1
M : Matroid α
I F X Y F' F₀ F₁ F₂ P L H H₁ H₂ H' B C K : Set α
e f : α
⊢ (emptyOn α).Flat F ↔ F = ∅
Tactic:
simp [← loopyOn_empty]
State after:
no goals