A Note on Infinite Symmetries of a Free Scalar on AdS Backgrounds and   the Breitenlohner-Freedman Bound
  We construct infinite dimensional symmetries of a complex, free scalar field on curved space-times generated by isometries of the space-time. We use the Anti de-Sitter backgrounds as an example and check that the boundary terms appearing in the Noether current satisfy the requirement of Noether's theorem that they vanish at the boundary. 
Adam Wardlow
hep-th