Yazici, SerdalCekim, BayramJarad, FahdJafari, HosseinMatematik2025-06-052025-06-0520250354-5180https://doi.org/10.2298/FIL2510329Yhttps://hdl.handle.net/20.500.12416/10119In this paper, a quantitative weighted transform based on the Jafari transform is proposed, and the mathematical foundations of this new transform are investigated. In the first section, some information about Jafari transform and some mathematical tools are reviewed. In the second section, the quantitative weighted Jafari transform is introduced, its existence guaranteed through a theorem, and its fundamental properties are examined. Additionally, transforms of the fractional derivative and fractional integral of a function with respect to a function h and a w-weight are obtained. In the third section, the theoretical findings are applied to solve classical and fractional initial value problems based on a function h and w-weight. In the last section, the results are discussed.eninfo:eu-repo/semantics/closedAccessWeighted Fractional DerivativeLaplace TransformJafari TransformMittag Leffler'S FunctionArticle39103329334110.2298/FIL2510329Y2-s2.0-105001411492WOS:001469410600011Q3Q3