2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189623Using light cone string field theory we derive recursion relations for closed string correlation functions and scattering amplitudes which hold to all orders in perturbation theory. These results extend to strings in a plane wave background.LaTeX, 11 pages, published version. References addedHigh Energy Physics - Theorytext