Recent content by HxWang

Thanks a lot, maajdl, Fredrik and HomogenousCow. This is my argument about the question: The word "generator" appears in "Group Theory" and "CM", this is the reason why we confused. In Group Theory, ∇ (or \pm i ∇ ) is the generator of translation, the manner we obtain it is "translating object...

How to understand "momentum is the generator of translation" ? "As it is known from classical mechanics, the momentum is the generator of translation", it is from WIKI, (http://en.wikipedia.org/wiki/Momentum_operator) I don't understand its meaning. T(ε) is translation operator, then...