2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149761The subject of this paper is the problem of arrangement of a real nonsingular algebraic curve on a real non-singular algebraic surface. This paper contains new restrictions on this arrangement extending Rokhlin and Kharlamov-Gudkov-Krakhnov congruences for curves on surfaces.LaTeX, 6 pagesAlgebraic Geometrytext