Theorem: Matroid.er_univ_eq (Matroid/Rank.lean)

State before:
α : Type u_1
ι : Type u_2
M✝ N : Matroid α
I B X X' Y Y' Z R : Set α
n : ℕ∞
e f : α
M : Matroid α
⊢ M.er univ = M.erk
Tactic:
rw [← er_inter_ground_eq, univ_inter, erk_eq_er_ground]
State after:
no goals