simp [ModularBase]
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
B X Y : Set α
⊢ (M.ModularBase B fun i => ↑i) ↔ M.Base B ∧ M.Basis (X ∩ B) X ∧ M.Basis (Y ∩ B) Y
no goals