Theorem: Matroid.StrictMinor.dual (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
h : N <m M
⊢ N✶ <m M✶
Tactic:
rwa [StrictMinor, dual_minor_iff, dual_minor_iff]
State after:
no goals