Theorem: Matroid.cl_inter_ground (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
M : Matroid α
X : Set α
⊢ M.cl (X ∩ M.E) = M.cl X
Tactic:
simp_rw [cl_def, inter_assoc, inter_self]
State after:
no goals