2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150135We give another proof of Imin Chen's result that the jacobian of the modular curve X(p)_{non-split}, for p a prime number, is isogeneous to the new part of the jacobian of X_0(p^2), using only the representation theory of the group GL_2(Z/pZ). In fact, we prove a generalization of Chen's result for objects with an action by GL_2(Z/pZ) in any pseudo-abelian Q-linear category.latex, 5 pages, hard copies availableAlgebraic Geometrytext