- #1
kof9595995
- 679
- 2
This is trivially true on the real line where s<s_0. Then he analytically continued [itex]M(s)[/itex] to the entire complex plane and then made use of (7.51) off the real line. But how one can be sure (7.51) holds on entire complex plane?Peskin said:[tex]M(s)=[M(s^*)]^*...(7.51)[/tex]