2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96989Let E(1)_p denote the rational elliptic surface with a single multiple fiber f_p of multiplicity p. We construct an infinite family of homologous non-isotopic symplectic tori representing the primitive class [f_p] in E(1)_p when p>1. As a consequence, we get infinitely many non-isotopic symplectic tori in the fiber class of the rational elliptic surface E(1) (complex projective plane blown-up at nine branch points of a generic pencil of cubic curves). We also show how these tori can be non-isotopically and symplectically embedded in many other symplectic 4-manifolds.8 pages, 3 figuresGeometric TopologySymplectic Geometry57R17, 57R57 (primary) 53D35, 57R95 (secondary)text