Sobre uma classe de disigualdades ótimas de Sobolev vetoriais de segunda ordem

Abstract

We approach potential elliptic systems involving Paneitz-Branson operators and critical nonlinearities. First, we present conditions for the existence of regular solutions of potential systems in Riemannian Geometry, a decomposition in diagonal bubbles to applications of Palais-Smale and theoretical applications of this decomposition. Then, we Euclidean space, we present another decomposition in bubbles and apply the decomposition in bubbles o a result of compactness. Finally, we apply all those results in extremal applications for optimal Sobolev inequalities on compact manifolds