Geometry of T-duality Original Research Article

A “reduced” differential geometry adapted to the presence of abelian isometries is constructed. Classical T-duality diagonalizes in this setting, allowing us to get conviniently the transformation of the relevant geometrical objects such as connections, pullbacks and generalized curvatures. Moreover we can induce privileged maps from the viewpoint of covariant derivatives in the target space and in the world-sheet generalizing previous results, at the same time that we can correct connections and curvatures covariantly in order to have a proper transformation under T-duality.