2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120485We define a topological invariant of complex projective plane curves. As an application, we present new examples of arithmetic Zariski pairs.18 pages, a correction in IntroductionAlgebraic Geometry14F45 (Primary) 14J28, 14G25 (Secondary)text