2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104051The graviton scattering in IIB superstring theory is examined in the context of S-duality and symmetry. There is an algebra that generates all of the terms in the four-point function to any order in derivatives. A map from the algebra to the scattering is given; it suggests the correctness of the full four-point function with the S-duality. The higher point functions are expected to follow a similar pattern.15 pages, LaTeX, 1 figureGeneral Physicstext