Theorem: Matroid.restrictSubtype_ground (Matroid/Map.lean)

State before:
α : Type u_1
β : Type u_2
f : α → β
E✝ I✝ s : Set α
M✝ : Matroid α
N✝ : Matroid β
E X I : Set α
M N : Matroid α
⊢ (M.restrictSubtype X).E = univ
Tactic:
simp [restrictSubtype]
State after:
no goals