(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In equation 11.60, Zwiebach is supposed to be checking whether p^mu(tau) generates translations.

Firstly, I am not sure why he checks i epsilon_rho p^rho(tau) instead.

Second, I am not sure why taking the commutator with x^mu(tau) shows that this generates translations. He claims that taking commutators is the way to generate symmetry transformations above, but I do not see where he justifies that statement?

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Zwiebach page 197

**Physics Forums | Science Articles, Homework Help, Discussion**