Lagrangian formalism

Hi,

May anybody tell the pre-reqs (on calculus) for learn the lagrangian formalism used on quantum field theory ?

Thanks.

malawi_glenn
Homework Helper
well integration and differentiation with several variables, functionals

However, you mention its use in QFT. If that's your goal, you'll need a lot more physics. In the introduction to his QFT book, Mark Srdnecki gives a set of equations, mostly from QM, that one should be familiar with as prerequisites. See page 8 of

http://www.physics.ucsb.edu/~mark/ms-qft-DRAFT.pdf

Expressed in English, you should be comfortable with:

1. Differential scattering cross-section.
2. Creation and annihilation operators.