Talk:U-duality

U in terms of S and T

The article says that U is somehow constructed from, but it not just, S and T dualities. I am sure I've read in either Polchinski or Schwartz & Becker precisely what U duality is but I cannot find it again. I remember it being something like doing a T duality in a particular set of directions and an S duality in the others? Something like that? If someone knows the section of the book I'm talking about (it could be Johnson - D Branes or one of many others, I don't read books in a coherent, organised fashion) I think it would make a nice addition to this article, to give it more of a concrete definition and also because I have an orbifold I'm doing T and S dualities on and I want to look at U duality but I can't find it's definition in terms of S and T dualities again!! Gah! AlphaNumeric (talk) 07:05, 10 September 2008 (UTC)