Matroid.IsCocircuit.delete_sdiff_isCocircuit

∀ {α : Type u_1} {M : Matroid α} {K X : Set α}, M.IsCocircuit K → X ⊆ K → X.Nonempty → (M.delete (K \ X)).IsCocircuit X

Defined in: Mathlib.Combinatorics.Matroid.Minor.Contract
Cited by: 1 results in Mathlib
Foundations: Depth 98 from the axioms · uses propext, Classical.choice, Quot.sound

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