[[alternative]]Noncoercive Quasi-variational Inequalities

[[abstract]]The theory of variational inequalities introduced by Stampacchia has emerged as an interesting branch of applied mathematics. This theory is a very effective tool for studying a wide class of nonlinear problems in a unified and general framework. Several theoretical results are known under a coerciveness property, see for instance, Br´ezis, Browder, Saigal and Mosco. However, the variational formulation of many nonlinear problems leads to noncoercive variational inequalities.