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Theorems · Theorem · order theory

IncidenceAlgebra.zeta_mul_zeta

∀ {𝕜 : Type u_2} {α : Type u_5} [inst : NonAssocSemiring 𝕜] [inst_1 : Preorder α] [inst_2 : LocallyFiniteOrder α]
  [inst_3 : DecidableLE α] (a b : α), (IncidenceAlgebra.zeta 𝕜 * IncidenceAlgebra.zeta 𝕜) a b = ↑(Finset.Icc a b).card
Defined in
Mathlib.Combinatorics.Enumerative.IncidenceAlgebra
Cited by
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Foundations
Depth 64 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NonAssocSemiringPreorderLocallyFiniteOrderDecidableLE

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