We establish conditions for the existence of almost periodic and periodic solutions of almost periodic difference equations with discrete argument in a metric space without using the -classes of these equations.
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Translated from Neliniini Kolyvannya, Vol. 18, No. 1, pp. 112–119, January–March, 2015.
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Slyusarchuk, V.Y. Periodic and Almost Periodic Solutions of Difference Equations in Metric Spaces. J Math Sci 215, 387–394 (2016). https://doi.org/10.1007/s10958-016-2845-7
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DOI: https://doi.org/10.1007/s10958-016-2845-7