Matroid.Indep.contract_isBase_iff

∀ {α : Type u_1} {M : Matroid α} {I B : Set α}, M.Indep I → ((M.contract I).IsBase B ↔ M.IsBase (B ∪ I) ∧ Disjoint B I)

Defined in: Mathlib.Combinatorics.Matroid.Minor.Contract
Cited by: 1 results in Mathlib
Foundations: Depth 94 from the axioms · uses propext, Classical.choice, Quot.sound

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