Finset.card_smul_inter

∀ {G : Type u_1} [inst : Group G] [inst_1 : DecidableEq G] (A B : Finset G) (x : G),
  (x • A ∩ B).card = A.convolution B⁻¹ x⁻¹

Defined in: Mathlib.Combinatorics.Additive.Convolution
Cited by: 3 results in Mathlib
Foundations: Depth 81 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Group DecidableEq

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