Document Type : Research Paper
Authors
1 Department of Mathematics, Payame Noor University, P.O.Box 19395-3697, Tehran, Iran
2 Department of Mathematics, Faculty of Science, Urmia University, Urmia, Iran
Abstract
In this paper, we define a class of meromorphically multivalent functions in $\mathbb{U^{\ast}}=\{z:z\in\mathbb{C}:0<|z|<1\}$ by using a differential operator. Important properties of this class such as coefficient estimates, distortion theorem, radius of starlikeness and convexity, closure theorems, and convolution properties are obtained. We also study $\delta$-neighboorhoods and partial sums for this class.
Keywords