Boutiara, Abdellatif; Matar, Mohammed M.; Kaabar, Mohammed K. A.; Martínez, Francisco; Etemad, Sina; Rezapour, Shahram Some qualitative analyses of neutral functional delay differential equation with generalized Caputo operator. (English) Zbl 1476.34159 J. Funct. Spaces 2021, Article ID 9993177, 13 p. (2021). Summary: In this paper, a new class of a neutral functional delay differential equation involving the generalized \(\psi\)-Caputo derivative is investigated on a partially ordered Banach space. The existence and uniqueness results to the given boundary value problem are established with the help of the Dhage’s technique and Banach contraction principle. Also, we prove other existence criteria by means of the topological degree method. Finally, Ulam-Hyers type stability and its generalized version are studied. Two illustrative examples are presented to demonstrate the validity of our obtained results. Cited in 8 Documents MSC: 34K37 Functional-differential equations with fractional derivatives 34K40 Neutral functional-differential equations 34K30 Functional-differential equations in abstract spaces 34K10 Boundary value problems for functional-differential equations 47N20 Applications of operator theory to differential and integral equations 34K27 Perturbations of functional-differential equations PDF BibTeX XML Cite \textit{A. Boutiara} et al., J. Funct. Spaces 2021, Article ID 9993177, 13 p. (2021; Zbl 1476.34159) Full Text: DOI OpenURL References: [1] Miller, K. S.; Ross, B., An Introduction to the Fractional Calculus and Fractional Differential Equations (1993), New York, NY, USA: John Wiley & Sons, New York, NY, USA · Zbl 0789.26002 [2] Kilbas, A. A.; Srivastava, H. M.; Trujillo, J. 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