Theorem: Matroid.cl_eq_of_subset_coloops (Matroid/Loop.lean)

State before:
α : Type u_1
β : Type u_2
M N : Matroid α
e f : α
B L L' I X Y Z F C K : Set α
hK : K ⊆ M✶.cl ∅
⊢ M.cl K = K ∪ M.cl ∅
Tactic:
rw [← empty_union K, cl_union_eq_of_subset_coloops _ hK, empty_union, union_comm]
State after:
no goals