Homework Statement
Hi,
I have two stupid questions about Peskin's QFT book.
(1) P23, How to derive from (2.35) to (2.36)
(2) P30, How to derive (2.54)
Homework Equations
(1)
(2)
The Attempt at a Solution
(1) If I consider the dual-space vector, \langle \mathbf{q} | = \sqrt{2...