Electronic Journal of Differential Equations, Vol. 2006(2006), No. 49, pp. 1-10. Title: Nonlinear elastic membranes involving the p-Laplacian operator Authors: Fabrizio Cuccu (Univ. di Cagliari, Italy) Behrouz Emamizadeh (Petroleum Institute, Abu Dhabi, UAE) Giovanni Porru (Univ. di Cagliari, Italy) Abstract: This paper concerns an optimization problem related to the Poisson equation for the p-Laplace operator, subject to homogeneous Dirichlet boundary conditions. Physically the Poisson equation models, for example, the deformation of a nonlinear elastic membrane which is fixed along the boundary, under load. A particular situation where the load is represented by a characteristic function is investigated. Submitted February 2, 2006. Published April 14, 2006. Math Subject Classifications: 35J20, 35B38, 49Q10. Key Words: p-Laplace; rearrangements; maximum principle; existence; uniqueness; domain derivative.