2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141441Our aim in this paper is to give some examples of $(a, 1)f$ Riemannian structures (a generalization of an $r$-paracontact structure) induced on product of spheres of codimension $r$ ($r \in \{1,2\} $) in an $m$-dimensional Euclidean space ($m>2$), endowed with an almost product structure.10 pagesDifferential Geometry53B25; 53C15text