Pure spinors in AdS and Lie algebra cohomology [PDF]
Andrei MikhailovWe show that the BRST cohomology of the massless sector of the Type IIB superstring on AdS5xS5 can be described as the relative cohomology of an infinite-dimensional Lie superalgebra. We explain how the vertex operators of ghost number 1, which correspond to conserved currents, are described in this language. We also give some algebraic description of the ghost number 2 vertices, which appears to be new.View original: http://arxiv.org/abs/1207.2441
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