Ebrahim Amini - Department of Mathematics, Payme Noor University, P. O. Box ۱۹۳۹۵-۴۶۹۷ Tehran, IRAN.

Abstract. In this paper, we define and investigate a new class of spirallike harmonic functions defined by a Salagean differential operator and we obtain a coefficient inequality for the functions in this class. Following, we investigated convolution and obtain the order of convolution consistence for certain spirallike harmonic univalent functions with negative coefficients.

Spirallike functions , Convolution , Coefficient bound , differential operator , ˜ ⊛-convolution consistence