Matroid.Indep.exists_insert_of_not_isBasis

∀ {α : Type u_1} {M : Matroid α} {I X J : Set α},
  M.Indep I → I ⊆ X → ¬M.IsBasis I X → M.IsBasis J X → ∃ e ∈ J \ I, M.Indep (insert e I)

Defined in: Mathlib.Combinatorics.Matroid.Minor.Restrict
Cited by: 0 results in Mathlib
Foundations: Depth 81 from the axioms · uses propext, Classical.choice, Quot.sound

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