Recent content by idempotent1729

Thank you so much! I couldn't for the life of me figure it out!

This is an old question, but since I stumbled upon it when the same confusion briefly bedeviled me after reading Nakahara, I decided to reply in case others follow a similar path. The key is that $\sigma_{\epsilon} (x)$ does not denote a left action. Instead, $\sigma_{\epsilon}$ denotes the...