2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75269In the paper we show that critical sequences associated with the mountain pass level for semilinear elliptic problems on $\R^N$ converge when the non-linearity is subcritical, superlinear and satisfies the penalty condition $F_\infty(s)<F(x,s)$. The proof suggests a concentration compactness framework for minimax problems, similar to that of P.-L.Lions for constrained minima.Analysis of PDEsFunctional Analysis35J20, 35J60, 49J35text