Recent content by naos

Thank you for your answers! Renormalization is a bit far from now, but I have a feeling that'll be an elegant approach. Thank for that. I definitely like the simple approach you're having, Physics Monkey, although it looks like a baking recipe ;) In addition to those proofs, would you know...

Hi, Would someone know where I can find a derivation of the lorentz-invariant lagrangian density? This lagrangian often pops-up in books and papers and they take it for granted, but I was actually wondering if there's a "simple" derivation somewhere... Or does it take a whole theory and...