1. The large $N$ limit of superconformal field theories and supergravity
2. Gauge theory correlators from non-critical string theory
3. Anti de Sitter space and holography
4. For a review, see O. Aharony, S.S. Gubser, J. Maldacena, H. Ooguri, Y. Oz, Large-N field theories, string theory and gravity, hep-th/9905111.
5. D.Z. Freedman, S.D. Mathur, A. Matusis, L. Rastelli, Correlation functions in the CFT(d)/AdS(d+1) correpondence, hep-th/9804058.