2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66476We show that coefficients in the Laurent series of Igusa Zeta functions are periods. This will be used in a subsequent paper (by P. Brosnan) to show that certain numbers occurring in study of Feynman amplitudes (upto gamma factors) are periods.12 pagesNumber TheoryAlgebraic Geometry32G20, 14F40text