Matroid.Indep.exists_isBasis_subset_union_isBasis

∀ {α : Type u_1} {M : Matroid α} {I X J : Set α},
  M.Indep I → I ⊆ X → M.IsBasis J X → ∃ I', M.IsBasis I' X ∧ I ⊆ I' ∧ I' ⊆ I ∪ J

Defined in: Mathlib.Combinatorics.Matroid.Minor.Restrict
Cited by: 0 results in Mathlib
Foundations: Depth 82 from the axioms · uses propext, Classical.choice, Quot.sound

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