Theorem: Matroid.Spanning.exists_base_subset (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
S T : Set α
hS : M.Spanning S
⊢ ∃ B, M.Base B ∧ B ⊆ S
Tactic:
rwa [spanning_iff_superset_base] at hS
State after:
no goals