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Abstract
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The study of boundary value problems (BVPs) for fractional differential–integral equations (FDIEs) is extremely popular in the scientific community. Scientists are utilizing BVPs for FDIEs in day life problems by the help of different approaches. In this paper, we apply monotone iterative technique for the existence, uniqueness and the error estimations of solutions for a coupled system of BVPs for FDIEs of orders ω, ∈ (3, 4]. The coupled system is given by where t ∈ [0, 1], δ, ν ∈ [1, 2] . The functions G1, G2 : [0, 1] × R × R → R, satisfy the Caratheodory conditions. The fractional derivatives Dω, Dε, Dδ , Dν are in Riemann-Liouville sense and I ω, I ε, I 3−ω, I 4−ω, I 3−ε, I 4−ε, I ω−δ , I ε−ν are fractional order integrals. The assumed technique is a better approach for the existence, uniqueness and error estimation. The applications of the results are examined by the help of examples.
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