2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101285We propose a general approach to the formal Poisson cohomology of $r$-matrix induced quadratic structures, we apply this device to compute the cohomology of structure 2 of the Dufour-Haraki classification, and provide complete results also for the cohomology of structure 7.19 pagesSymplectic Geometry17B63, 17B56On a general approach to the formal cohomology of quadratic Poisson structurestext