is a smooth open bounded set and f : Ω × ℝ → ℝ is a Carathéodory function. We show that u is a solution of the above problem iff it is a critical point of the corresponding non-smooth action functional. Applications concerning nontrivial solutions for a class of such Dirichet problems depending on a parameter are provided.
Bereanu, C., Mawhin, J., & Jebelean, P. (2014). The Dirichlet problem with mean curvature operator in Minkowski space - A variational approach. Advanced Nonlinear Studies, 14(2), 315-326. https://hdl.handle.net/2078.5/192680 (Original work published 2014)