Recent content by droblly

I have got it. It's just calculating the Cartan integers from the basis.

I have started learning Lie algebra and I can't understand one example given in the notes. Given: [h_{\alpha},e_{\alpha}] = 2 e_{\alpha} [h_{\alpha},f_{\alpha}] = -2 f_{\alpha} [e_{\alpha},f_{\alpha}] = h_{\alpha} and that [x,y] = K(x,y) t_{\alpha} if \alpha is a root and x \in...

Thank you guys =) I appreciate your help.

Dear all, I am wondering if Introduction Classical Dynamics of Particles & Systems (5 ed.) by Marion and Thornton is any good? I have already studied year 1 Classical Mechanics course, using University Physics by Young and Freedman. May I know if Marion&Thornton book is of higher level and...