Existence and multiplicity of solutions for fractional p₁ (x, ) \& p₂ (x, ) -Laplacian Schrödinger-type equations with Robin boundary conditions

Abstract In this paper, we study fractional p₁ (x, ) \& p₂ (x, ) p1 (x, ⋅) &p2 (x, ⋅) -Laplacian Schrödinger-type equations for Robin boundary conditions. Under some suitable assumptions, we show that two solutions exist using the mountain pass lemma and Ekeland’s variational principle. Then, the existence of infinitely many solutions is derived by applying the fountain theorem and the Krasnoselskii genus theory, respectively. Different from previous results, the topic of this paper is the Robin boundary conditions in R^N RN∖Ω‾ for fractional order p₁ (x, ) \& p₂ (x, ) p1 (x, ⋅) &p2 (x, ⋅) -Laplacian Schrödinger-type equations, including concave-convex nonlinearities, which has not been studied before. In addition, two examples are given to illustrate our results.