2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168970We describe a variation of Dworks unit-root method to determine the degree four Frobenius polynomial for members of a 1-modulus Calabi-Yau family over $\mathbb{P}^1$ in terms of the holomorphic period near a point of maximal unipotent monodromy. The method is illustrated on a couple of examples.corrected typos, remarks to sections 2.4 and 3.2. addedAlgebraic GeometryNumber Theory11G25; 11Sxx; 11Y70; 14G10; 14Qxx; 115xxtext