Srednicki Definition and 56 Threads

He defines U(1 + \delta \omega) \approx 1 + \frac{i}{2} \delta \omega_{\mu \nu} M^{\mu \nu} Then he considers U(\Lambda^{-1} \Lambda' \Lambda) with \Lambda' = 1 + \delta \omega' He then says that U(\Lambda^{-1} \Lambda' \Lambda) \approx \delta \omega_{\mu \nu}...

Homework Statement Verify that (2.16) follows from (2.14). Here \Lambda is a Lorentz transformation matrix, U is a unitary operator, M is a generator of the Lorentz group. Homework Equations 2.8: \delta\omega_{\rho\sigma}=-\delta\omega_{\sigma\rho} M^{\mu\nu}=-M^{\nu\mu} 2.14...

\intdt' G(t-t') f(t') = 1/i \delta/\deltaf(t) where G(t-t') = i/ 2w exp (iw (t-t')) I thought the RHS of the first equation is f(t). Can someone explain? thank you

I have been working through Srednicki this summer to teach myself qft, and all too often I've gotten stuck on a small point and ended up spending a great deal of time clearing it up by myself. While this is probably an important part of the learning process, I am progressing a bit too slowly, so...

Could someone help me how in this book by Srednicki I get from eq. 54.23 to 54.24? thank you (The book is free on the net, I'm not allowed yet to post the link on this forum, maybe some other can do.)

Homework Statement Srednicki problem (8.8) Under a free-field theory, calculate <A|0> , where |A> is the real sclar field's eigenket Homework Equations The Attempt at a Solution I am trying to write <A|0> into path integral formulation, but it is hard.