Abstract
By making use of the critical point theory, the existence of periodic solutions for fourth-order nonlinear difference equations is obtained. The proof is based on the Saddle Point Theorem in combination with variational technique. The problem is to solve the existence of periodic solutions of fourth-order nonlinear difference equations. Results obtained complement the existing one.
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More From: Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas
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