Recent content by mak_294

Can anyone help?

Hey I have Mathematica 8 and I'm wondering if FeynArts and FormCalc are already installed or I have to install them from somewhere else? If the first how I can get it? Many thanks in advance

Xepma, many thanks. that helped me a lot. And yes I got Poisson bracket mistake.

Xepma, many thanks for your answer. It helped me a lot. Even though I've read the Poisson bracket before in Jones' book, you make it much clearer. However, and excuse my naive question, is the difference because of the existence of the derivation?

Hi guys I'm quit confuse here I want to know what's the difference between lie product and commutation relation? I've been told that every commutator is lie product but not the way around, but I can't see the difference?