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[en] The general structure of N=2 moduli space at arbitrary genus and instanton number is investigated. The N=2 NSR string measure is calculated, yielding picture- and U(1) ghost number-changing operator insertions. An explicit formula for the spectral flow operator acting on vertex operators is given, and its effect on N=2 string amplitudes is discussed. (orig.)
Source
Mar 1995; 14 p; ITP-UH--13/95; HEP-TH--9503232; ISSN 0418-9833; 