Certain classes of analytic functions defined by Hurwitz–Lerch zeta function

In this work, we introduce and investigate a new class k-U⁢S~s⁢(b,μ,γ,t){k-\widetilde{US}_{s}(b,\mu,\gamma,t)}of analytic functions in the open unit disk Uwith negative coefficients. The object of the present paper is to determine coefficient estimates, neighborhoods and partial sums for functions fbelonging to this class.