2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63800Let $D$ be a divisor in ${\bf C}^n$. We present methods to compare the ${\mathcal D}$-module of the meromorphic functions ${\mathcal O}[* D]$ to some natural approximations. We show how the analytic case can be treated with computations in the Weyl algebra.11 pagesAlgebraic GeometryCommutative Algebra32C38, 13N10, 14F40, 13P10text