Matroid.cRk_closure

∀ {α : Type u} (M : Matroid α) [M.InvariantCardinalRank] (X : Set α), M.cRk (M.closure X) = M.cRk X

Defined in: Mathlib.Combinatorics.Matroid.Rank.Cardinal
Cited by: 1 results in Mathlib
Foundations: Depth 88 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Matroid.InvariantCardinalRank

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