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Can someone please explain to me Eq 2.30 in Schroeder's and Peskin's book? (page 21)

how does he simplify the long equation of the commutator to this delta distribution?

[tex]\imath\delta^(^3^)\ (x - x') [/tex]

Thanks

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# Homework Help: Explanation of Eq of Peskin's Intro to QFT Book

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