Talk:Action-angle coordinates

Proper definition of the action-angle variables
I believe that the author of the article confused the notation when talking about the action-angle variables. In particular, the variable $$\mathbf{w}$$ is generally called the angle and $$\mathbf{J}$$ is the action. I would like to correct this if there are no objections. Also, one should probably indicate that the derivation holds only for separable $$S$$ in proper separated coordinates $$q_i$$. PtolRek (talk) 20:44, 15 October 2010 (UTC)


 * In accordance with Goldstein's nomenclature, I think you are using the right vocabularies. Please make the necessary correction.  Thanks!LaoChen (talk) 05:27, 17 October 2010 (UTC)