Hajishafieiha, J.Abbasbandy, S.Allahviranloo, T.2024-05-192024-05-1920232731-80952731-8109https://doi.org10.1007/s40995-023-01457-zhttps://hdl.handle.net/20.500.12713/5141The numerical solution of the fractional nonlinear multi-pantograph delay differential equations is investigated by a new class of polynomials. These polynomials are equipped with an unknown auxiliary parameter a, which is obtained by using the collocation and least-squares methods. In this paper, the numerical solution of the fractional nonlinear multi-pantograph delay differential equation is displayed in the truncated series form. The existence and uniqueness of the solution and the error analysis are also investigated in this article. In four examples, the numerical results of the present method have been compared with other methods. For the first time, a-polynomials are used in this article to numerically solve the fractional nonlinear multi-pantograph delay differential equations, and accurate approximations have been displayed.eninfo:eu-repo/semantics/closedAccessFractional Multi-Pantograph Delay Differential EquationsCollocation MethodCaputo Fractional DerivativeArticle473825835WOS:0009732181000022-s2.0-85160774575N/A10.1007/s40995-023-01457-zN/A