Vertex operators for AdS3 with Ramond background

This review gives results on vertex operators for the Type IIB superstring in an AdS3xS3 background with Ramond-Ramond flux, which were presented at S trings 2000. Constraint equations for these vertex operators are derived, a nd their components are shown to satisfy the supergravity linearized equati ons of motion for the six-dimensional (2, 0) theory of a supergravity and t ensor multiplet expanded around AdS3xS3 space-time. (C) 2001 American Insti tute of Physics.