exact M.cl_subset_cl (iInter_subset _ i)
ι : Type u_1
α : Type u_2
M : Matroid α
B I J X X' Y Y' F : Set α
Xs Ys Js Is : ι → Set α
i✝ j : ι
e f : α
inst✝ : Nonempty ι
hB : M.ModularBase B Xs
i : ι
⊢ M.cl (⋂ i, Xs i) ⊆ M.cl (Xs i)
no goals