Recent content by N.J.R

I don't know the relation of graviton and closed string. Why the graviton is closed string? And what conditions need that? :confused: I really want to know about it in detail.(of course including formula)

Right you are. I told the paper what I have cited. But what I asked you are not that. I am poor at figures-specially, in this string theory. I know the variational principle, partial integration and Laplacian. Also, I read the Ohanian's book and the paper several times. Nevertheless I couldn't...

The book that you recommend is very nice. Nevertheless, I can't understand eq.(12),(27),(28) and configuration(that is X0,X1,X2) of p13,14.(I'm sorry that I don't know how to write the eq. in this post.) How so?

I need your help again. I read "D-Brane Primer"(by Clifford V. Johnson) ( http://arxiv.org/PS_cache/hep-th/pdf/0007/0007170.pdf ) That's what I want! But I confront with a mathematical difficulty. I don't know the expression. I have no idea what that means. So, will you please recommend me...

Thank you for helping me. In fact, professor suggested studing for motion of a string a classical point of view. Frankly speaking, I don't know what did he mean by that. I thought 'what motion? And what I do calculate?'. Anyway he said that he already knows the solution and there are some...

first, I'm sorry that not be good at English. I don't know motion of a string from a classical point of view. Generally it deals with quantum mechanics. But I want to know motion of a string from a classical point of view. In the case of a very simple open string(spin with c velocity)...