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In this article, we investigate the supersymmetric c=1 model of superstringtheory and demonstrate how the spectrum of states is expanded and newsymmetries of the theory are generated by the existence of ghost cohomologies.As a result, we establish significant connections between two-dimensionalsupergravity and physical theories in higher dimensions. Additionally, weprovide a comprehensive guide for constructing BRST-invariant and nontrivialvertex operators and carry out explicit computations to determine thecorrection terms needed to maintain BRST invariance of the correspondingcurrents.

Discrete physical states and correction terms in the Supersymmetric c=1 Model of String Theory