`BookProof.QgCouplingDGammaSum.dGamma_finsetSum_col` (s : Finset ι) (cols : ι → ℕ → (ℕ →₀ ℂ)) (u : FockAlg) : dGamma (fun k => ∑ i ∈ s, cols i k) u = ∑ i ∈ s, dGamma (cols i) u

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`BookProof.QgCouplingDGammaSum.dGamma_finsetSum_col` (s : Finset ι) (cols : ι → ℕ → (ℕ →₀ ℂ)) (u : FockAlg) : dGamma (fun k => ∑ i ∈ s, cols i k) u = ∑ i ∈ s, dGamma (cols i) u · Prove2Me