N = 1 from N = 2 superstrings
Ohta, N, Petersen, J L · CERN Document Server (European Organization for Nuclear Research) · 1993
We give a simple proof that a particular class of $N=2$ superstrings are equivalent to the $N=1$ superstrings. This is achieved by constructing a similarity transformation which transforms the $N=2$ BRST operators into a direct sum of the BRST operators for the $N=1$ string and topological sectors.