Theorem: Matroid.loopyOn_cl_eq (Matroid/Closure.lean)

State before:
α : Type u_1
ι : Type u_2
M : Matroid α
F I J X✝ Y B C R : Set α
e f x y : α
E X : Set α
⊢ (loopyOn E).E ⊆ (loopyOn E).cl ∅
Tactic:
rw [(loopyOn_base_iff.2 rfl).cl_eq]
State after:
no goals