2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69086Using the idea of special Legendre curves, the authors obtained the explicit description of flat Lagrangian H-umbilical submanifolds in quaternion Euclidean spaces.Differential Geometry53C42The explicit formula of flat Lagrangian H-umbilical submanifolds in quaternion Euclidean spacestext