2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96988Let E(1)_K denote the closed 4-manifold that is homotopy equivalent (hence homeomorphic) to the rational elliptic surface E(1) and is obtained by performing Fintushel-Stern knot surgery on E(1) using a knot K in S^3. We construct an infinite family of homologous non-isotopic symplectic tori representing a primitive homology class in E(1)_K when K is any nontrivial fibred knot in S^3. We also show how these tori can be non-isotopically embedded as homologous symplectic submanifolds in other symplectic 4-manifolds.8 pages, 2 figuresGeometric TopologySymplectic Geometry57R17, 57R57 (Primary) 53D35, 57R95text