Replusz
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- TL;DR
- I don't quite understand the steps taken to get to the second line (3.71->3.72):
(http://www.damtp.cam.ac.uk/user/tong/qft/qft.pdf)
Invert an integral equation to find this unknown
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Apart from the insane habit in physics to write the measure in front of the integrand (
) and other conventions related to factors of ##\pi##, this follows from taking inverse Fourier transforms on both sides of (3.71).
) and other conventions related to factors of ##\pi##, this follows from taking inverse Fourier transforms on both sides of (3.71).
Replusz
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Thank you for your quick and perfectly clear reply! :)