Argyros, G.Argyros, M.Argyros, I.K.George, S.2026-02-052021Problemy Analiza, 2021, 10(28), 2, pp. 18-2623063424https://doi.org/10.15393/J3.ART.2021.9230https://idr.nitk.ac.in/handle/123456789/23443We present the semi-local convergence analysis of a two-step derivative-free method for solving Banach space valued equations. The convergence criteria are based only on the first derivative and our idea of recurrent functions. © Petrozavodsk State University, 2021derivative-free methodsemi-local convergencespace