Some chiral rings of N=2 discrete superconformal series induced by SL(2)   degenerate conformal field theories
  By generalizing a fermionic construction, a natural relation is found between SL(2) degenerate conformal field theories and some N=2 discrete superconformal series. These non-unitary models contain, as a subclass, N=2 minimal models. The construction permits one to investigate the properties of chiral operators in the N=2 models. A chiral ring reveals a close connection with underlying quantum group structures. 
Oleg Andreev (Ecole Normale Superieure and Landau Institute for   Theoretical Physics)