Theorem: Matroid.delete_base_iff (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 D D₁ D₂ R : Set α
⊢ (M ＼ D).Base B ↔ M.Basis B (M.E \ D)
Tactic:
rw [← restrict_compl, base_restrict_iff]
State after:
no goals