2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73118We continue our study of the variation of parabolic cohomology (math.AG/0310139) and derive an exact formula for the underlying Poincare duality. As an illustration of our methods, we compute the monodromy of the Picard-Euler system and its invariant Hermitian form, reproving a classical theorem of Picard.18 pages, 3 figuresAlgebraic GeometryComplex Variables14D05; 32G20text