2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79404We define a symplectic structure on the space of non parametrized loops in $G_2$ manifold. We also develop some basics of intersection theory of Lagrangian submanifolds.10 pages, LatexSymplectic GeometryThe structure of a symplectic manifold on the space of loops of 7-manifoldtext