assumption
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
inst✝ : Fintype ι
Xs : ι → Set α
h : ∀ (i : ι), M.rFin (Xs i)
Is : ι → Set α
hIs : ∀ (i : ι), M.Basis' (Is i) (Xs i)
hfin : (⋃ i, Is i).Finite
hcl : M.rFin (M.cl (⋃ i, Is i))
⊢ M.rFin (M.cl (⋃ i, Is i))
no goals