Clark, Marcondes R.Lima, Osmundo A.2020-07-152020-07-152002-02-21Clark, M. R., & Lima, O. A. (2002). Existence of solutions for a variational unilateral system. <i>Electronic Journal of Differential Equations, 2002</i>(22), pp. 1-18.1072-6691https://hdl.handle.net/10877/12086In this work the authors study the existence of weak solutions of the nonlinear unilateral mixed problem associated to the inequalities utt - M(|∇u|2) ∆u + θ ≥ f, θt - ∆θ + ut ≥ g, where f, g, M are given real-valued functions with M positive.Text18 pages1 file (.pdf)enAttribution 4.0 InternationalWeak solutionsVariational unilateral nonlinear problemGalerkin methodPenalization methodArticleThis work is licensed under a Creative Commons Attribution 4.0 International License.