- #1
Ratzinger
- 291
- 0
would someone mind opening his/her beloved P&S and help me out..
on p.20 it says if we expand the classical Klein-Gordon field in Fourier (momentum) space, we arrive at equation 2.21...why is that?
gracias
on p.20 it says if we expand the classical Klein-Gordon field in Fourier (momentum) space, we arrive at equation 2.21...why is that?
gracias