Electronic Journal of Differential Equations, Vol. 2020 (2020), No. 116, pp. 1-22. Title: General p-curl systems and duality mappings on Sobolev spaces for Maxwell equations Authors: Dhruba R. Adhikari (Kennesaw State Univ., Kennesaw, GA, USA) Eric Stachura (Kennesaw State Univ., Kennesaw, GA, USA) Abstract: We study a general p-curl system arising from a model of type-II superconductors. We show several trace theorems that hold on either a Lipschitz domain with small Lipschitz constant or on a C^{1,1} domain. Certain duality mappings on related Sobolev spaces are computed and used to establish surjectivity results for the p-curl system. We also solve a nonlinear boundary value problem for a general p-curl system on a C^{1,1} domain and provide a variational characterization of the first eigenvalue of the p-curl operator. Submitted January 19, 2020. Published November 24, 2020. Math Subject Classifications: 49J40, 46E35, 49J50. Key Words: p-curl operator; duality mappings; trace theorems; Nemytskii operator.