2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66372We give a detailed account of the classical Van Kampen method for computing presentations of fundamental groups of complements of complex algebraic curves, and of a variant of this method, working with arbitrary projections (even with vertical asymptotes).12 pagesGroup TheoryAlgebraic Geometry20F05; 57M05text