2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54300We analyze the BRST cohomology of the critical N=2 NSR string using chiral bosonization. Picture-changing and spectral flow is made explicit in a holomorphic field basis. The integration of fermionic and U(1) moduli is performed and yields picture- and U(1) ghost number-changing insertions into the string measure for n-point amplitudes at arbitrary genus and U(1) instanton number.Talk at ``Strings '95'', March 95; 2 pagesHigh Energy Physics - Theorytext