2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50388The BRST formulation is used in order to derive the existence criterion for classical bi-Hamiltonian systems, based on non-anomalous deformation of the gauge-fixing structure. The recursion operator is then used to provide the entire hierarchy of integrable models associated to the original BRST and anti-BRST charges.7 pagesHigh Energy Physics - Theorytext