2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/173382The Lagrangian frame-like formulation of free higher spin symmetric bosonic AdS(d) fields is given within a manifestly sp(2) invariant framework. It is designed to deal with infinite multiplets of fields appearing as gauge connections of the higher spin algebras.23 pages; v2: extra refs, minor additions and typos, acknowledgements added; v3: a few clarifications added, published versionHigh Energy Physics - Theorytext