Show explicitly that the second-order term of the normalization condition (11.8.11) is correct, by showing that

Show that the last two terms with four δ-functions are negligible compared to the first two terms.

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**qtay Z) Flopolzhol = (mm) becomes τη X (ΣΣΕ) Ιω με τα αποτελε ΣΦΟΣΦΟ p' |0) (11.8.15) (W/V) = \CR\alt=Σ ΦΩΦ» (ΦΦΦΦ) k, pp - x(διαδρ + δρικδι',' - Sk,ρδκρ′ δρ, δρ – δκ,ρ δκ,ρδκ,ρ′δι,ρ). (11.8.16)