2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36213In this paper the isometries of the dual space were investigated. The dual structural equations of a Killing tensor of order two were found . The flat space case was analyzed in details.6 pages LaTeX, content enlarged and revised, to appear in Supplemento ai Rendiconti del Circolo Matematico di PalermoGeneral Relativity and Quantum Cosmologytext