Theorem: Matroid.minor_dual_iff_dual_minor (Matroid/Minor/Basic.lean)

State before:
α : Type u_1
M M' N : Matroid α
e f : α
I J R B X Y Z K : Set α
M₀ M₁ M₂ : Matroid α
⊢ N ≤m M✶ ↔ N✶ ≤m M
Tactic:
rw [← dual_minor_iff, dual_dual]
State after:
no goals