We deal with the existence result for nonlinear elliptic equations of the form Au + g(x, u,∇u) = f, where the term –div (a(x, u, ∇u)) is a Leray–Lions operator from a subset of \( {W}_0^1{L}_M\left(\Omega \right) \) into its dual. The growth and coercivity conditions on the monotone vector field a are prescribed by an N-function M, which not necessarily satisfies a Δ2-condition. Therefore, we use Orlicz–Sobolev spaces that are not necessarily reflexive and assume that the nonlinearity g(x, u,∇u) is a Carathéodory function satisfying solely a growth condition without any sign condition. The right-hand side f belongs to \( {W}^{-1}{L}_{\overline{M}}\left(\Omega \right). \)
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Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 72, No. 4, pp. 509–526, April, 2020.
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Moussa, H., Rhoudaf, M. & Sabiki, H. Existence Results for a Perturbed Dirichlet Problem Without Sign Condition in Orlicz Spaces. Ukr Math J 72, 585–606 (2020). https://doi.org/10.1007/s11253-020-01802-0
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DOI: https://doi.org/10.1007/s11253-020-01802-0