Theorem: Matroid.delete_loop_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).Loop e ↔ M.Loop e ∧ e ∉ D
Tactic:
rw [← singleton_dep, delete_dep_iff, disjoint_singleton_left, singleton_dep]
State after:
no goals