Remarks on T-duality for open strings

Abstract

This contribution gives in sigma-model language a short review of recent work on T-duality for open strings in the presence of abelian or non-abelian gauge fields. Furthermore, it adds a critical discussion of the relation between RG beta-functions and the Born-Infeld action in the case of a string coupled to a D-brane.

7 pages, LATEX, requires esprc2.sty (included in uu-file)