2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96881This short note presents a simple construction of nonisotopic symplectic tori representing the same primitive homology class in the symplectic 4-manifold E(1)_K, obtained by knot surgery on the rational elliptic surface E(1) with the left-handed trefoil knot K. E(1)_K has the simplest homotopy type among simply-connected symplectic 4-manifolds known to exhibit such property.5 pages, 2 figures. To appear in Proc.Amer.Math.SocGeometric TopologySymplectic Geometry57R17, 57R57text