Non-isometric U-dualities

A bstract I study generalisations of U-duality transformations which do not rely on the existence isometries. start by providing more details a recently proposed generalised map between solutions type IIA supergravity form M 7 × S 3 , with NSNS flux, and 11-dimensional supergravity, in three-sphere is replaced four-dimensional geometry encodes three-algebra structure constants. then show that when admits two abelian isometries, TsT deformations side become six-vector setting. These involve an action E 6(6) both isometric non-isometric directions. discuss algebraic interpretation these deformations, compare contrast them (generalised) Yang-Baxter supergravity.