2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66421Functions of several quaternion variables are investigated and integral representation theorems for them are proved. With the help of them solutions of the $\tilde \partial $-equations are studied. Moreover, quaternion Stein manifolds are defined and investigated.30 pages, LatexComplex Variables30E20 (Primary) 30C99 (Secondary)text