Matroid.IsBase.compl_closure_sdiff_singleton_isCocircuit

∀ {α : Type u_1} {M : Matroid α} {e : α} {B : Set α}, M.IsBase B → e ∈ B → M.IsCocircuit (M.E \ M.closure (B \ {e}))

For an element e of a base B, the complement of the closure of B \ {e} is a cocircuit.

Defined in: Mathlib.Combinatorics.Matroid.Circuit
Cited by: 1 results in Mathlib
Foundations: Depth 103 from the axioms · uses propext, Classical.choice, Quot.sound

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