Polynomial Bounds for a Class of Univalent Function Involving Sigmoid Function

[摘要] In this work, a new subclass of univalent function was defined using the  Sălăgean  differential operator involving the modified sigmoid function and the Chebyshev polynomials. The coefficient bounds and the Fekete-Szego functional of this class were obtained using subordination principle. The results obtained agree and extend some earlier results.

[学科分类] 公共、环境与职业健康