- #1
Lapidus
- 344
- 11
Two (supposedly) trival questions in Schwartz's QFT notes. The notes can be found http://isites.harvard.edu/fs/docs/icb.topic521209.files/QFT-Schwartz.pdf.
1. page 155, equation 15.2, how does the integrand reduce to k dk? I would guess that there must be some logarithm, but k dk?
2. page 172, equtiation 17.11, why is it legal to shift the variable that way? Will the x integral not notice when we add the x to the equation? I mean, the one x term comletlely disappears after the shifting.
thank you!
1. page 155, equation 15.2, how does the integrand reduce to k dk? I would guess that there must be some logarithm, but k dk?
2. page 172, equtiation 17.11, why is it legal to shift the variable that way? Will the x integral not notice when we add the x to the equation? I mean, the one x term comletlely disappears after the shifting.
thank you!