Spirallikeness properties on Salagean-type harmonic univalent functions

Abstract

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.

Keywords

• "spirallike functions", "convolution", "coefficient bound"
• "differential operator", "˜ ⊛-convolution consistence"