SPECTRAL FLOWS AND TWISTED TOPOLOGICAL THEORIES

We analyze the action of the spectral flows on N = 2 twisted topologic al theories. We show that they provide a useful mapping between the tw o twisted topological theories associated to a given N = 2 superconfor mal theory. This mapping can also be viewed as a topological algebra a utomorphism. In particular null vectors are mapped into null vectors, considerably simplifying their computation. We give the level 2 result s. Finally we discuss the spectral flow mapping in the case of the DDK and KM realizations of the topological algebra.