2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61375We obtain some basic partial differential operators connected with nonholomorphic automorphic forms on $Γ\backslash U(2, 1)/K$. We give the corresponding Eisenstein series of weight $k$ and automorphic Green functions of weight $k$. Moreover, we get the product formulas connected with them. As a consequence of the product formulas, we give the functional equations of Eisenstein series associated to a convex cocompact subgroup of U(2,1).79 pagesNumber TheoryAlgebraic GeometryRepresentation Theory11F55, 11F60, 11F66, 14G10, 22E40text