Theorem: Matroid.delete_nonloop_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).Nonloop e ↔ M.Nonloop e ∧ e ∉ D
Tactic:
rw [← indep_singleton, delete_indep_iff, disjoint_singleton_left, indep_singleton]
State after:
no goals