Stringy gravity, interacting tensionless strings and massless higher spins

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Consequences of a strong version of the AdS/CFT correspondence for extremely stringy physics are examined. In particular, properties of N = 4 supersymmetric Yang-Mills theory are used to extract results about interacting tensionless strings and massless higher spin fields in an AdS₅ x S⁵ background. Furthermore, the thermodynamics of this model signals the presence of a Hawking-Page phase transition between AdS₅ space and a "black hole"-like high temperature configuration even in the extreme string limit.