Ahmed, IdrisJarad, FahdKumam, PoomJarad, FahdBorisut, PiyachatJirakitpuwapat, WachirapongMatematik2022-10-112022-10-112020Ahmed, Idris...et al. (2020). "On Hilfer generalized proportional fractional derivative", Advances in Difference Equations, Vol. 2020, No. 1.1687-1847https://doi.org/10.1186/s13662-020-02792-wJirakitpuwapat, Wachirapong/0000-0002-5160-0036; Jirakitpuwapat, Wachirapong/0009-0008-6318-3832; Kumam, Poom/0000-0002-5463-4581Motivated by the Hilfer and the Hilfer-Katugampola fractional derivative, we introduce in this paper a new Hilfer generalized proportional fractional derivative, which unifies the Riemann-Liouville and Caputo generalized proportional fractional derivative. Some important properties of the proposed derivative are presented. Based on the proposed derivative, we consider a nonlinear fractional differential equation with nonlocal initial condition and show that this equation is equivalent to the Volterra integral equation. In addition, the existence and uniqueness of solutions are proven using fixed point theorems. Furthermore, we offer two examples to clarify the results.eninfo:eu-repo/semantics/openAccessExistenceProportional Fractional DerivativeFixed Point TheoremsNonlocal ConditionVolterra Integral Equation26A3334A1234A4334D20Article2020110.1186/s13662-020-02792-w2-s2.0-85087311179WOS:000548923600004Q1N/A