2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55882This paper is a letter-type version of hep-th/9806236. We discuss properties of non-linear equations of motion which describe higher-spin gauge interactions for massive spin-0 and spin-1/2 matter fields in 2+1 dimensional anti-de Sitter space. The model is shown to have N=2 supersymmetry and to describe higher-spin interactions of d3 N=2 massive hypermultiplets. An integrating flow is found which reduces the full non-linear system to the free field equations via a non-local Bäcklund-Nicolai-type mapping.LaTeX, 14 pages, no figures; minor correctionsHigh Energy Physics - Theorytext